Company lists · Data refreshed September 2026
Top 25 Security clearance investigation firms worldwide
RevenueBase identified 1,179 company matches for security clearance investigation firms worldwide as of September 2026 and tracks 12,594 professional contacts across them, including 2,534 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers company matches for security clearance investigation firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026. Country and city lists for security clearance investigation firms follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest security clearance investigation firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,332 contacts → | ||||
Exact match “DataFlow Group is a pioneering global provider of specialized Primary Source Verification (PSV) solutions, and background screening and immigration compliance services that assist…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 2 | 677 contacts → | ||||
Exact match “OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 3 | 518 contacts → | ||||
Exact match “CoventBridge Group is the leading worldwide full service investigation solutions company providing: Surveillance, SIU and Compliance, Claims Investigation, Counter-Fraud Programs…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 4 | 477 contacts → | ||||
Exact match “Empowering Confident Hiring Decisions for 15+ Years Verifacts is India’s trusted background verification partner-delivering accurate, customizable checks across employees…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 5 | 433 contacts → | ||||
Exact match “ClearanceJobs.com the largest security-cleared career network, specializes in defense jobs for professionals with security clearances.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 6 | 292 contacts → | ||||
Exact match “HUB Enterprises is a national insurance defense investigative firm.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 7 | 252 contacts → | ||||
Exact match “ADC supports government and corporate clients with two primary services - personnel security, ranging from pre-employment checks to comprehensive background investigations and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 8 | 194 contacts → | ||||
Exact match “TAG PGS, Inc.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 9 | 146 contacts → | ||||
Exact match “A federally qualified Small Business, IDS offers end to end investigative solutions tailored to meet the specific needs of our clients.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 10 | 137 contacts → | ||||
Exact match “Vault Workforce Screening was acquired by Sterling on January 2, 2024.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 11 | 129 contacts → | ||||
Exact match “Beau Dietl & Associates is a premier private investigation firm based in New York City with offices in New Jersey, Florida, and California.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 12 | 112 contacts → | ||||
Exact match “Every decision carries a risk.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 13 | 82 contacts → | ||||
Exact match “AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 14 | 81 contacts → | ||||
Exact match “Crystal Screening Services – Secure Your Workforce with Confidence In today’s fast-moving business environment, hiring the right people isn’t just important-it’s critical.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 15 | 72 contacts → | ||||
Exact match “Integrated Security Services, Inc.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 16 | 69 contacts → | ||||
Exact match “CSI is a full-service investigative firm that delivers key facts to give our clients an actionable advantage in a wide range of situations.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 17 | 68 contacts → | ||||
Exact match “Hiring the right people isn’t just about checking a box-it’s about ensuring accuracy, mitigating risk, and protecting your organization.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 18 | 68 contacts → | ||||
Exact match “A leading provider of background check and primary source verification services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 19 | 59 contacts → | ||||
Exact match “For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 20 | 58 contacts → | ||||
Exact match “Creative Services, Inc.(CSI) is a full-service background investigations and security consulting firm.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 21 | 55 contacts → | ||||
Exact match “Integritas Global Services is a leading Background Verification Company, established in 2017 amidst the burgeoning momentum of the APAC Background Verification market.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 22 | 53 contacts → | ||||
Exact match “SIRCO offers efficient investigative methods to counter: Theft, Fraud, Collusion with Suppliers, Drug Trafficking, Threats, Trademarks Piracy, Labour Disputes, Harassment…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 23 | 51 contacts → | ||||
Exact match “ExamWorks Investigation Services is a leading claims investigation company providing the insurance, banking, retail and other sectors with a range of innovative and cost effective…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 24 | 45 contacts → | ||||
Exact match “Larrek Investigations has been in operation since April 30, 1980, with our current ownership having been in place since October 31, 2008.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 25 | 45 contacts → | ||||
Exact match “Founded in 2008, SecureSearch has been helping businesses effectively manage their screening programs for over a decade and has since established itself as the trusted…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “security clearance investigation firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,179 security clearance investigation firms worldwide
See the full list, filter by size, metro and specialty, and access 2,534 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Security clearance investigation firms worldwide at a glance
As of Sep 29, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for security clearance investigation firms are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “security clearance investigation firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 2,534 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Security clearance investigation firms by location
4 lists · largest firstEvery Security clearance investigation firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “security clearance investigation firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many security clearance investigation firms are there worldwide?
RevenueBase identified 1,179 company matches for security clearance investigation firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Dataflow Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most security clearance investigation firms?
The United States leads with 688 companies, followed by India (68) and Canada (47). Every security clearance investigation firms list by country and city is linked on this page.
Which city has the most security clearance investigation firms?
New York leads with 20 company records, followed by Houston (11) and Jacksonville (9).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,534 professional contacts with verified work emails tracked across these 1,179 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,179 security clearance investigation firms worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
Company intelligence · public preview
Top 25 security clearance investigation firms worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,179 matching company records for security clearance investigation firms worldwide, with 12,594 tracked contacts and 2,534 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 security clearance investigation firms worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Dataflow Groupdataflowgroup.com HQ: Dubai, United Arab EmiratesReported employees: 501-1,000 | Dubai, United Arab Emirates | 501-1,000 | Exact match | 1,332 contacts → |
“DataFlow Group is a pioneering global provider of specialized Primary Source Verification (PSV) solutions, and background screening and immigration compliance services that assist…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Omniplex World Services Corporationomniplex.comHQ: Herndon, VA, United StatesReported employees: 1,001-5,000 | Herndon, VA, United States | 1,001-5,000 | Exact match | 677 contacts → |
“OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Coventbridge Groupcoventbridge.comHQ: Jacksonville, FL, United StatesReported employees: 501-1,000 | Jacksonville, FL, United States | 501-1,000 | Exact match | 518 contacts → |
“CoventBridge Group is the leading worldwide full service investigation solutions company providing: Surveillance, SIU and Compliance, Claims Investigation, Counter-Fraud Programs…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Verifacts Services PVT LTDverifacts.co.inHQ: Bangalore, IndiaReported employees: 501-1,000 | Bangalore, India | 501-1,000 | Exact match | 477 contacts → |
“Empowering Confident Hiring Decisions for 15+ Years Verifacts is India’s trusted background verification partner-delivering accurate, customizable checks across employees…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Clearancejobsclearancejobs.com HQ: Centennial, CO, United StatesReported employees: 51-200 | Centennial, CO, United States | 51-200 | Exact match | 433 contacts → |
“ClearanceJobs.com the largest security-cleared career network, specializes in defense jobs for professionals with security clearances.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HUB Enterprises, INChubenterprises.com HQ: Broussard, LA, United StatesReported employees: 501-1,000 | Broussard, LA, United States | 501-1,000 | Exact match | 292 contacts → |
“HUB Enterprises is a national insurance defense investigative firm.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  ADC LTD NMadcltdnm.comHQ: Albuquerque, NM, United StatesReported employees: 501-1,000 | Albuquerque, NM, United States | 501-1,000 | Exact match | 252 contacts → |
“ADC supports government and corporate clients with two primary services - personnel security, ranging from pre-employment checks to comprehensive background investigations and…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | TAD Pgs, INCtadpgs.com HQ: Bradenton, FL, United StatesReported employees: 51-200 | Bradenton, FL, United States | 51-200 | Exact match | 194 contacts → |
“TAG PGS, Inc.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Information Discovery Services LLCinformationdiscovery.netHQ: Fort Worth, TX, United StatesReported employees: 51-200 | Fort Worth, TX, United States | 51-200 | Exact match | 146 contacts → |
“A federally qualified Small Business, IDS offers end to end investigative solutions tailored to meet the specific needs of our clients.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Vault Workforce Screening, A First Advantage Companyvaulthealth.comHQ: Coral Gables, FL, United StatesReported employees: 201-500 | Coral Gables, FL, United States | 201-500 | Exact match | 137 contacts → |
“Vault Workforce Screening was acquired by Sterling on January 2, 2024.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Beau Dietl & Associatesinvestigations.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 129 contacts → |
“Beau Dietl & Associates is a premier private investigation firm based in New York City with offices in New Jersey, Florida, and California.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Securitas Indiasecuritas.inHQ: Gurgaon, IndiaReported employees: 10001+ | Gurgaon, India | 10001+ | Exact match | 112 contacts → |
“Every decision carries a risk.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  AJ Squared Securityaj2security.comHQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 82 contacts → |
“AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Crystal Screening Services Private Limitedcrystalscreening.comHQ: Noida, IndiaReported employees: 201-500 | Noida, India | 201-500 | Exact match | 81 contacts → |
“Crystal Screening Services – Secure Your Workforce with Confidence In today’s fast-moving business environment, hiring the right people isn’t just important-it’s critical.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Integrated Security Servicesintesecurity.comHQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 72 contacts → |
“Integrated Security Services, Inc.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  CSI Corporate Security And Investigationscsiinvestigators.comHQ: Monaca, PA, United StatesReported employees: 201-500 | Monaca, PA, United States | 201-500 | Exact match | 69 contacts → |
“CSI is a full-service investigative firm that delivers key facts to give our clients an actionable advantage in a wide range of situations.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | THUROthuro.ai HQ: Cleveland, OH, United StatesReported employees: 51-200 | Cleveland, OH, United States | 51-200 | Exact match | 68 contacts → |
“Hiring the right people isn’t just about checking a box-it’s about ensuring accuracy, mitigating risk, and protecting your organization.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Cleansheet Groupcleansheetgroup.com HQ: Dubai, United Arab EmiratesReported employees: 51-200 | Dubai, United Arab Emirates | 51-200 | Exact match | 68 contacts → |
“A leading provider of background check and primary source verification services.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  LKA Grouplkagroup.com.auHQ: Carlton, AustraliaReported employees: 51-200 | Carlton, Australia | 51-200 | Exact match | 59 contacts → |
“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Creative Services, INCcreativeservices.com HQ: Mansfield, MA, United StatesReported employees: 51-200 | Mansfield, MA, United States | 51-200 | Exact match | 58 contacts → |
“Creative Services, Inc.(CSI) is a full-service background investigations and security consulting firm.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Integritasintegritas.inHQ: Bangalore, IndiaReported employees: 501-1,000 | Bangalore, India | 501-1,000 | Exact match | 55 contacts → |
“Integritas Global Services is a leading Background Verification Company, established in 2017 amidst the burgeoning momentum of the APAC Background Verification market.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  SIRCOgroupesirco.comHQ: Montréal-nord, CanadaReported employees: 51-200 | Montréal-nord, Canada | 51-200 | Exact match | 53 contacts → |
“SIRCO offers efficient investigative methods to counter: Theft, Fraud, Collusion with Suppliers, Drug Trafficking, Threats, Trademarks Piracy, Labour Disputes, Harassment…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Examworks Investigation Servicesexamworks-is.co.ukHQ: Bolton, United KingdomReported employees: 51-200 | Bolton, United Kingdom | 51-200 | Exact match | 51 contacts → |
“ExamWorks Investigation Services is a leading claims investigation company providing the insurance, banking, retail and other sectors with a range of innovative and cost effective…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Larrek Investigationslarrek.com HQ: Waterloo, ON, CanadaReported employees: 51-200 | Waterloo, ON, Canada | 51-200 | Exact match | 45 contacts → |
“Larrek Investigations has been in operation since April 30, 1980, with our current ownership having been in place since October 31, 2008.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Securesearch Screening Servicessecuresearch.co.inHQ: Navi Mumbai, IndiaReported employees: 51-200 | Navi Mumbai, India | 51-200 | Exact match | 45 contacts → |
“Founded in 2008, SecureSearch has been helping businesses effectively manage their screening programs for over a decade and has since established itself as the trusted…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,179 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Security clearance investigation firms: dataset insights
September 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,175 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 1,179 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Security clearance investigation firms by location
4 lists · largest firstEvery Security clearance investigation firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for security clearance investigation firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many security clearance investigation firms did RevenueBase find worldwide?
The saved snapshot records 1,179 matching company records, 12,594 tracked contacts and 2,534 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 security clearance investigation firms worldwide. Snapshot: September 29, 2026. https://revenuebase.ai/companies/browse/security-clearance-investigation-firms.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 security clearance investigation firms worldwide
RevenueBase records 1,179 matching company records for security clearance investigation firms worldwide, with 12,594 tracked contacts and 2,534 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 security clearance investigation firms worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Dataflow Groupdataflowgroup.com HQ: Dubai, United Arab EmiratesReported employees: 501-1,000 | Dubai, United Arab Emirates | 501-1,000 | Exact match | 1,332 contacts → |
“DataFlow Group is a pioneering global provider of specialized Primary Source Verification (PSV) solutions, and background screening and immigration compliance services that assist…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Omniplex World Services Corporationomniplex.com HQ: Herndon, VA, United StatesReported employees: 1,001-5,000 | Herndon, VA, United States | 1,001-5,000 | Exact match | 677 contacts → |
“OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Coventbridge Groupcoventbridge.com HQ: Jacksonville, FL, United StatesReported employees: 501-1,000 | Jacksonville, FL, United States | 501-1,000 | Exact match | 518 contacts → |
“CoventBridge Group is the leading worldwide full service investigation solutions company providing: Surveillance, SIU and Compliance, Claims Investigation, Counter-Fraud Programs…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Verifacts Services PVT LTDverifacts.co.in HQ: Bangalore, IndiaReported employees: 501-1,000 | Bangalore, India | 501-1,000 | Exact match | 477 contacts → |
“Empowering Confident Hiring Decisions for 15+ Years Verifacts is India’s trusted background verification partner-delivering accurate, customizable checks across employees…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Clearancejobsclearancejobs.com HQ: Centennial, CO, United StatesReported employees: 51-200 | Centennial, CO, United States | 51-200 | Exact match | 433 contacts → |
“ClearanceJobs.com the largest security-cleared career network, specializes in defense jobs for professionals with security clearances.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HUB Enterprises, INChubenterprises.com HQ: Broussard, LA, United StatesReported employees: 501-1,000 | Broussard, LA, United States | 501-1,000 | Exact match | 292 contacts → |
“HUB Enterprises is a national insurance defense investigative firm.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | ADC LTD NMadcltdnm.com HQ: Albuquerque, NM, United StatesReported employees: 501-1,000 | Albuquerque, NM, United States | 501-1,000 | Exact match | 252 contacts → |
“ADC supports government and corporate clients with two primary services - personnel security, ranging from pre-employment checks to comprehensive background investigations and…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | TAD Pgs, INCtadpgs.com HQ: Bradenton, FL, United StatesReported employees: 51-200 | Bradenton, FL, United States | 51-200 | Exact match | 194 contacts → |
“TAG PGS, Inc.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Information Discovery Services LLCinformationdiscovery.net HQ: Fort Worth, TX, United StatesReported employees: 51-200 | Fort Worth, TX, United States | 51-200 | Exact match | 146 contacts → |
“A federally qualified Small Business, IDS offers end to end investigative solutions tailored to meet the specific needs of our clients.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Vault Workforce Screening, A First Advantage Companyvaulthealth.com HQ: Coral Gables, FL, United StatesReported employees: 201-500 | Coral Gables, FL, United States | 201-500 | Exact match | 137 contacts → |
“Vault Workforce Screening was acquired by Sterling on January 2, 2024.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Beau Dietl & Associatesinvestigations.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 129 contacts → |
“Beau Dietl & Associates is a premier private investigation firm based in New York City with offices in New Jersey, Florida, and California.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Securitas Indiasecuritas.in HQ: Gurgaon, IndiaReported employees: 10001+ | Gurgaon, India | 10001+ | Exact match | 112 contacts → |
“Every decision carries a risk.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | AJ Squared Securityaj2security.com HQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 82 contacts → |
“AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Crystal Screening Services Private Limitedcrystalscreening.com HQ: Noida, IndiaReported employees: 201-500 | Noida, India | 201-500 | Exact match | 81 contacts → |
“Crystal Screening Services – Secure Your Workforce with Confidence In today’s fast-moving business environment, hiring the right people isn’t just important-it’s critical.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Integrated Security Servicesintesecurity.com HQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 72 contacts → |
“Integrated Security Services, Inc.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | CSI Corporate Security And Investigationscsiinvestigators.com HQ: Monaca, PA, United StatesReported employees: 201-500 | Monaca, PA, United States | 201-500 | Exact match | 69 contacts → |
“CSI is a full-service investigative firm that delivers key facts to give our clients an actionable advantage in a wide range of situations.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | THUROthuro.ai HQ: Cleveland, OH, United StatesReported employees: 51-200 | Cleveland, OH, United States | 51-200 | Exact match | 68 contacts → |
“Hiring the right people isn’t just about checking a box-it’s about ensuring accuracy, mitigating risk, and protecting your organization.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Cleansheet Groupcleansheetgroup.com HQ: Dubai, United Arab EmiratesReported employees: 51-200 | Dubai, United Arab Emirates | 51-200 | Exact match | 68 contacts → |
“A leading provider of background check and primary source verification services.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | LKA Grouplkagroup.com.au HQ: Carlton, AustraliaReported employees: 51-200 | Carlton, Australia | 51-200 | Exact match | 59 contacts → |
“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Creative Services, INCcreativeservices.com HQ: Mansfield, MA, United StatesReported employees: 51-200 | Mansfield, MA, United States | 51-200 | Exact match | 58 contacts → |
“Creative Services, Inc.(CSI) is a full-service background investigations and security consulting firm.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Integritasintegritas.in HQ: Bangalore, IndiaReported employees: 501-1,000 | Bangalore, India | 501-1,000 | Exact match | 55 contacts → |
“Integritas Global Services is a leading Background Verification Company, established in 2017 amidst the burgeoning momentum of the APAC Background Verification market.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | SIRCOgroupesirco.com HQ: Montréal-nord, CanadaReported employees: 51-200 | Montréal-nord, Canada | 51-200 | Exact match | 53 contacts → |
“SIRCO offers efficient investigative methods to counter: Theft, Fraud, Collusion with Suppliers, Drug Trafficking, Threats, Trademarks Piracy, Labour Disputes, Harassment…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Examworks Investigation Servicesexamworks-is.co.uk HQ: Bolton, United KingdomReported employees: 51-200 | Bolton, United Kingdom | 51-200 | Exact match | 51 contacts → |
“ExamWorks Investigation Services is a leading claims investigation company providing the insurance, banking, retail and other sectors with a range of innovative and cost effective…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Larrek Investigationslarrek.com HQ: Waterloo, ON, CanadaReported employees: 51-200 | Waterloo, ON, Canada | 51-200 | Exact match | 45 contacts → |
“Larrek Investigations has been in operation since April 30, 1980, with our current ownership having been in place since October 31, 2008.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Securesearch Screening Servicessecuresearch.co.in HQ: Navi Mumbai, IndiaReported employees: 51-200 | Navi Mumbai, India | 51-200 | Exact match | 45 contacts → |
“Founded in 2008, SecureSearch has been helping businesses effectively manage their screening programs for over a decade and has since established itself as the trusted…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,179 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Security clearance investigation firms: dataset insights
September 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,175 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 1,179 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Security clearance investigation firms by location
4 lists · largest firstEvery Security clearance investigation firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for security clearance investigation firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many security clearance investigation firms did RevenueBase find worldwide?
The saved snapshot records 1,179 matching company records, 12,594 tracked contacts and 2,534 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 security clearance investigation firms worldwide. Snapshot: September 29, 2026. https://revenuebase.ai/companies/browse/security-clearance-investigation-firms.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗