Company lists · Data refreshed September 2026

Top 25 Investigative consulting firms based in Los Angeles, United States

Name: Investigative consulting firms based in Los Angeles, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 63 companies tracked

RevenueBase identified 63 investigative consulting firms headquartered in Los Angeles, United States as of September 2026 and tracks 1,362 professional contacts across them, including 347 with verified work emails. Across the United States, New York is the largest hub for this category (156 companies); Los Angeles has 63.

This list covers investigative consulting firms headquartered in Los Angeles, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

63Companies

1,362Contacts tracked

347Verified emails

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The 25 largest investigative consulting firms based in Los Angeles, United States

Ranked by team size

Top 25 of 63 investigative consulting firms based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to investigative consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Professional Security Consultants, INC	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	626 contacts →
	Strong evidence “Professional Security Consultants, Inc.(PSC) is a world-class provider of security guard services, patrol, investigations, backgrounds, consulting, security screening & specialty…” Source: RevenueBase Database · checked Sep 28, 2026
2	Resolution Economics	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	201-500	232 contacts →
	Partial evidence “Founded in 1998, Resolution Economics provides sophisticated economic, statistical, and financial analyses, forensic investigations, forensic technology, dispute advisory, expert…” Source: RevenueBase Database · checked Sep 28, 2026
3	Black BOX Security, INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	51-200	91 contacts →
	Indirect evidence “Black Box Security Inc.” Source: RevenueBase Database · checked Sep 28, 2026
4	Gnarus Advisors LLC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “Gnarus Advisors combines economic, scientific, engineering, and regulatory expertise to provide clients with multidimensional support on a wide range of challenges affecting their…” Source: RevenueBase Database · checked Sep 28, 2026
5	Palicon Group	Strong evidence	Los Angeles, United StatesHQ checked Sep 28, 2026	51-200	28 contacts →
	Strong evidence “Palicon Group is a Southern California based firm specializing in workplace investigations, security, and public safety consulting.” Source: RevenueBase Database · checked Sep 28, 2026
6	Berger Consulting Group	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “Berger Consulting Group is a Los Angeles-based consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
7	Universal Strategic Advisors LLC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	18 contacts →
	Partial evidence “Universal Strategic Advisors, LLC (US Advisors) is a veteran & minority-owned boutique consulting firm with global reach serving a diverse set of government and industry clients.” Source: RevenueBase Database · checked Sep 28, 2026
8	Franklin Global, INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
9	Origin Investigations INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Origin is a private investigation and intelligence agency.” Source: RevenueBase Database · checked Sep 28, 2026
10	Engel & Engel, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	12 contacts →
	Indirect evidence “Engel & Engel has been engaged in the practice of forensic accounting and expert testimony for 30 years.” Source: RevenueBase Database · checked Sep 28, 2026
11	Public Interest Investigations, INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “Public Interest Investigations is a leading provider of neutral, trauma-informed workplace investigations, Title IX investigations, and criminal investigations for public…” Source: RevenueBase Database · checked Sep 28, 2026
12	Investigative Consultants IC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “Investigative Consultants is an independent, highly skilled, and fully licensed professional investigative company dedicated to “Protecting the Rights of Creative Minds®”.” Source: RevenueBase Database · checked Sep 28, 2026
13	Decision Analysis, INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Serving clients for nearly 40 years in over cases, Decision Analysis is a litigation consulting company based out of Los Angeles, California.” Source: RevenueBase Database · checked Sep 28, 2026
14	Forensic Economic Services FES	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “At Forensic Economic Services LLC, we are a consulting provider.” Source: RevenueBase Database · checked Sep 28, 2026
15	Lynx Insights & Investigations, INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Lynx Insights is an investigations firm that finds facts in a world of opinions, diversions and misinformation.” Source: RevenueBase Database · checked Sep 28, 2026
16	Fulcrum Financial Inquiry LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Strong evidence “Fulcrum is a financial and economics consulting firm specializing in complex litigation, investigation and appraisal issues.” Source: RevenueBase Database · checked Sep 28, 2026
17	Andersen Integrated Services	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “Andersen Integrated Services, Inc.(Andersen) is a full service consulting firm specializing in Forensic Engineering, Environmental, and Specialty Consulting Services.” Source: RevenueBase Database · checked Sep 28, 2026
18	Sunset Blvd. Investigations, INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Los Angeles based Sunset Blvd Investigations, Inc, provides investigative services to clients all over the world.” Source: RevenueBase Database · checked Sep 28, 2026
19	LUX Mundi	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Providing research and consulting services to organizations and government entities” Source: RevenueBase Database · checked Sep 28, 2026
20	Tristar Investigation	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Partial evidence “Tristar Investigation is a full-service detective agency with a 28-year track record of delivering first-class investigative results in California and for clients worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
21	VWM Analytics	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “VWM Analytics is now part of J.S.” Source: RevenueBase Database · checked Sep 28, 2026
22	Amherst Consulting Group	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Amherst Consulting Group is a veteran-owned and operated consulting firm serving VC-backed startups, self-funded entrepreneurs, and established companies.” Source: RevenueBase Database · checked Sep 28, 2026
23	MSN Forensics	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “We redefine modern forensic accounting at MSN Forensics by combining AI-powered technology and decades of investigative expertise.” Source: RevenueBase Database · checked Sep 28, 2026
24	Dsweiser Legal	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “At DSWeiser Legal, our purpose is clear, to help our clients manage risk by conducting thorough, prompt, and impartial workplace and campus investigations.” Source: RevenueBase Database · checked Sep 28, 2026
25	Freeman & Mills, INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Freeman & Mills is one of the most respected and experienced litigation consulting firms in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: investigative consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names investigative consulting firms.
Partial evidence: Its own public description names part of investigative consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigative consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 63 investigative consulting firms based in Los Angeles, United States

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Investigative consulting firms based in Los Angeles, United States at a glance

As of Sep 28, 2026

25.5%Verified-email coverage

21.6Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Los Angeles, so it is reported there. Company counts and contact totals on this page are exact for Los Angeles, over 63 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among investigative consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Los Angeles, United States whose own description of what they do matches “investigative consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names investigative consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among investigative consulting firms, and records with no verified work email. Companies headquartered outside Los Angeles are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 347 across the full list. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Investigative consulting firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names investigative consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many investigative consulting firms are there based in Los Angeles, United States?

RevenueBase identified 63 investigative consulting firms headquartered in Los Angeles, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Professional Security Consultants, INC, headquartered in Los Angeles, tops this list with the largest team on record.

Which city in the United States has the most investigative consulting firms?

New York leads the United States with 156 headquartered companies, followed by Houston (78) and Washington (73). Los Angeles has 63.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 347 verified decision-maker contacts tracked across these 63 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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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 Smart Search, 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.