Company lists · Data refreshed November 2026
Top 15 Mechanical engineering services based in St. Louis, United States
RevenueBase identified 29 company matches for mechanical engineering services associated with St. Louis, United States as of November 2026 and tracks 1,140 professional contacts across them, including 642 with verified work emails. Across the United States, Houston is the largest hub for this category (156 companies); St. Louis has 29.
This list covers company matches for mechanical engineering services associated with St. Louis, United States, 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 November 6, 2026.
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 15 largest mechanical engineering services based in St. Louis, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 141 contacts → | ||||
Exact match “McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 74 contacts → | ||||
Exact match “The principals at Case Engineering, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 28 contacts → | ||||
Exact match “Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 26 contacts → | ||||
Exact match “CASCO is a national full-service architecture, engineering, and design firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 24 contacts → | ||||
Exact match “Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 14 contacts → | ||||
Exact match “At Frontenac Engineering, we design and implement solutions, not just projects.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 13 contacts → | ||||
Exact match “Webb Engineering Services, Inc.(WES) is an engineering consulting firm that provides high-quality mechanical, electrical, plumbing, and fire protection design services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 8 contacts → | ||||
Exact match “Structures, Inc, is a consulting engineering firm providing structural design and engineering services to the commercial, industrial, municipal and institutional construction…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 7 contacts → | ||||
Exact match “ECS is a full-service mechanical, electrical, plumbing, fire protection and telecommunication consulting engineering firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 6 contacts → | ||||
Exact match “Objex Design is a Saint Louis based design firm that provides Industrial Design and Mechanical Engineering services that spans a variety of industries including, industrial…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 5 contacts → | ||||
Exact match “CEDC is a St.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 4 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 4 contacts → | ||||
Exact match “As of August 1, 2018, we have joined Mazzetti, a global MEP engineering and technology consulting firm (based in San Francisco, CA).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 4 contacts → | ||||
Exact match “Allen Designs, LLC is a design and consultant firm that provides services for engineering firms, contractors, construction companies, and residential property owners.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 3 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 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 “mechanical engineering services”. 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 15 of 29 mechanical engineering services based in St. Louis, United States
See the full list, filter by size, metro and specialty, and access 642 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Mechanical engineering services based in St. Louis, United States at a glance
As of Nov 6, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 29 companies.
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.
- What qualifies
- Company records associated with St. Louis, United States whose business descriptions match “mechanical engineering services” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 642 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 November 6, 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.
Mechanical engineering services by metro in the United States
- Mechanical engineering services in Houston156
- Mechanical engineering services in New York146
- Mechanical engineering services in Austin76
- Mechanical engineering services in Miami67
- Mechanical engineering services in Chicago59
- Mechanical engineering services in San Diego58
- Mechanical engineering services in Atlanta56
- Mechanical engineering services in Dallas53
- Mechanical engineering services in Los Angeles45
- Mechanical engineering services in Charlotte43
- Mechanical engineering services in San Antonio42
- Mechanical engineering services in San Francisco42
- Mechanical engineering services in Orlando40
- Mechanical engineering services in Phoenix40
- Mechanical engineering services in Denver38
- Mechanical engineering services in Portland38
- Mechanical engineering services in Tampa38
- Mechanical engineering services in Columbus31
- Mechanical engineering services in Seattle31
- Mechanical engineering services in Indianapolis30
- Mechanical engineering services in Raleigh29
- Mechanical engineering services in Irvine28
- Mechanical engineering services in Las Vegas28
- Mechanical engineering services in Philadelphia26
- Mechanical engineering services in Pittsburgh25
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 “mechanical engineering services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many mechanical engineering services are there based in St. Louis, United States?
RevenueBase identified 29 company matches for mechanical engineering services associated with St. Louis, United States as of November 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?
Mcclure Engineering-St. Louis MEP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United States has the most mechanical engineering services?
Houston leads the United States with 156 company records, followed by New York (146) and Austin (76). St. Louis has 29.
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 642 professional contacts with verified work emails tracked across these 29 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 November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 29 mechanical engineering services based in St. Louis, United States. Start with a free account, no credit card.
Download this list →Related lists
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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 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
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- Lists by location
- Lists A-Z
- New lists
- Mechanical engineering services based in Buenos Aires, Argentina
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Company intelligence · public preview
Top 15 mechanical engineering services based in St. Louis, United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 29 matching company records for mechanical engineering services based in St. Louis, United States, with 1,140 tracked contacts and 642 verified work emails.
This public preview shows 15 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 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 15 mechanical engineering services based in St. Louis, United States
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 |  Mcclure Engineering-St. Louis MEPmcclureeng.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 141 contacts → |
“McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Case Engineering, INCcaseengineeringinc.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 74 contacts → |
“The principals at Case Engineering, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Solutions AECsolutions-aec.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 28 contacts → |
“Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Casco Architecture & Engineeringcascocorp.comHQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 26 contacts → |
“CASCO is a national full-service architecture, engineering, and design firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Architectural Design Guildadg-stl.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 24 contacts → |
“Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Frontenac Engineering Groupfe-stl.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 14 contacts → |
“At Frontenac Engineering, we design and implement solutions, not just projects.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Webb Engineering Services, INCwebb-engineering.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 13 contacts → |
“Webb Engineering Services, Inc.(WES) is an engineering consulting firm that provides high-quality mechanical, electrical, plumbing, and fire protection design services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Structures, INCstlsi.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 8 contacts → |
“Structures, Inc, is a consulting engineering firm providing structural design and engineering services to the commercial, industrial, municipal and institutional construction…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  ECSecsstl.comHQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 7 contacts → |
“ECS is a full-service mechanical, electrical, plumbing, fire protection and telecommunication consulting engineering firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Objex Designobjexdesign.comHQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 6 contacts → |
“Objex Design is a Saint Louis based design firm that provides Industrial Design and Mechanical Engineering services that spans a variety of industries including, industrial…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 5 contacts → |
“CEDC is a St.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Mcginnis & Associates Consulting Engineers, INCmcginnisstructural.comHQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 |  Mazzetti Wmtaomazzetti.comHQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 4 contacts → |
“As of August 1, 2018, we have joined Mazzetti, a global MEP engineering and technology consulting firm (based in San Francisco, CA).” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Allen Designs, LLCallendzines.comHQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 4 contacts → |
“Allen Designs, LLC is a design and consultant firm that provides services for engineering firms, contractors, construction companies, and residential property owners.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Alkemeyer & Associates, LLCalkemeyer.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 15 of 29 company matches
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Mechanical engineering services: dataset insights
November 6, 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
29 records in the displayed employee bands.
0 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 United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 29 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: November 6, 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 ↗
Mechanical engineering services by metro in the United States
- Mechanical engineering services in Houston156
- Mechanical engineering services in New York146
- Mechanical engineering services in Austin76
- Mechanical engineering services in Miami67
- Mechanical engineering services in Chicago59
- Mechanical engineering services in San Diego58
- Mechanical engineering services in Atlanta56
- Mechanical engineering services in Dallas53
- Mechanical engineering services in Los Angeles45
- Mechanical engineering services in Charlotte43
- Mechanical engineering services in San Antonio42
- Mechanical engineering services in San Francisco42
- Mechanical engineering services in Orlando40
- Mechanical engineering services in Phoenix40
- Mechanical engineering services in Denver38
- Mechanical engineering services in Portland38
- Mechanical engineering services in Tampa38
- Mechanical engineering services in Columbus31
- Mechanical engineering services in Seattle31
- Mechanical engineering services in Indianapolis30
- Mechanical engineering services in Raleigh29
- Mechanical engineering services in Irvine28
- Mechanical engineering services in Las Vegas28
- Mechanical engineering services in Philadelphia26
- Mechanical engineering services in Pittsburgh25
Questions about this company list
What does Exact match mean for mechanical engineering services?
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 mechanical engineering services did RevenueBase find based in St. Louis, United States?
The saved snapshot records 29 matching company records, 1,140 tracked contacts and 642 verified emails. The public preview displays 15 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: November 6, 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
Mechanical engineering services by geography
- Mechanical engineering services based in Buenos Aires, Argentina
- Mechanical engineering services based in Adelaide, Australia
- Mechanical engineering services based in Brisbane, Australia
- Mechanical engineering services based in Melbourne, Australia
- Mechanical engineering services based in Perth, Australia
- Mechanical engineering services based in Sydney, Australia
- Mechanical engineering services based in Vienna, Austria
- Mechanical engineering services based in Barueri, Brazil
- Mechanical engineering services based in Belo Horizonte, Brazil
- Mechanical engineering services based in Campinas, Brazil
- Mechanical engineering services based in Curitiba, Brazil
- Mechanical engineering services based in Goiania, Brazil
Cite this list
RevenueBase Data Team. Top 15 mechanical engineering services based in St. Louis, United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/mechanical-engineering-services/united-states/st-louis.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Mechanical engineering services based in Buenos Aires, Argentina
- Mechanical engineering services based in Adelaide, Australia
- Mechanical engineering services based in Brisbane, Australia
- Mechanical engineering services based in Melbourne, Australia
- Mechanical engineering services based in Perth, Australia
- Mechanical engineering services based in Sydney, Australia
Company intelligence · public preview
Top 15 mechanical engineering services based in St. Louis, United States
RevenueBase records 29 matching company records for mechanical engineering services based in St. Louis, United States, with 1,140 tracked contacts and 642 verified work emails.
This public preview shows 15 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 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 15 mechanical engineering services based in St. Louis, United States
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 | Mcclure Engineering-St. Louis MEPmcclureeng.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 141 contacts → |
“McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Case Engineering, INCcaseengineeringinc.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 74 contacts → |
“The principals at Case Engineering, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Solutions AECsolutions-aec.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 28 contacts → |
“Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Casco Architecture & Engineeringcascocorp.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 26 contacts → |
“CASCO is a national full-service architecture, engineering, and design firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Architectural Design Guildadg-stl.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 24 contacts → |
“Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Frontenac Engineering Groupfe-stl.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 14 contacts → |
“At Frontenac Engineering, we design and implement solutions, not just projects.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Webb Engineering Services, INCwebb-engineering.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 13 contacts → |
“Webb Engineering Services, Inc.(WES) is an engineering consulting firm that provides high-quality mechanical, electrical, plumbing, and fire protection design services.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Structures, INCstlsi.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 8 contacts → |
“Structures, Inc, is a consulting engineering firm providing structural design and engineering services to the commercial, industrial, municipal and institutional construction…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | ECSecsstl.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 7 contacts → |
“ECS is a full-service mechanical, electrical, plumbing, fire protection and telecommunication consulting engineering firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Objex Designobjexdesign.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 6 contacts → |
“Objex Design is a Saint Louis based design firm that provides Industrial Design and Mechanical Engineering services that spans a variety of industries including, industrial…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 5 contacts → |
“CEDC is a St.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Mcginnis & Associates Consulting Engineers, INCmcginnisstructural.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 | Mazzetti Wmtaomazzetti.com HQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 4 contacts → |
“As of August 1, 2018, we have joined Mazzetti, a global MEP engineering and technology consulting firm (based in San Francisco, CA).” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Allen Designs, LLCallendzines.com HQ: St. Louis, MO, United StatesReported employees: 11-50 | St. Louis, MO, United States | 11-50 | Exact match | 4 contacts → |
“Allen Designs, LLC is a design and consultant firm that provides services for engineering firms, contractors, construction companies, and residential property owners.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Alkemeyer & Associates, LLCalkemeyer.com HQ: St. Louis, MO, United StatesReported employees: 1-10 | St. Louis, MO, United States | 1-10 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 15 of 29 company matches
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Mechanical engineering services: dataset insights
November 6, 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
29 records in the displayed employee bands.
0 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 United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 29 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: November 6, 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 ↗
Mechanical engineering services by metro in the United States
- Mechanical engineering services in Houston156
- Mechanical engineering services in New York146
- Mechanical engineering services in Austin76
- Mechanical engineering services in Miami67
- Mechanical engineering services in Chicago59
- Mechanical engineering services in San Diego58
- Mechanical engineering services in Atlanta56
- Mechanical engineering services in Dallas53
- Mechanical engineering services in Los Angeles45
- Mechanical engineering services in Charlotte43
- Mechanical engineering services in San Antonio42
- Mechanical engineering services in San Francisco42
- Mechanical engineering services in Orlando40
- Mechanical engineering services in Phoenix40
- Mechanical engineering services in Denver38
- Mechanical engineering services in Portland38
- Mechanical engineering services in Tampa38
- Mechanical engineering services in Columbus31
- Mechanical engineering services in Seattle31
- Mechanical engineering services in Indianapolis30
- Mechanical engineering services in Raleigh29
- Mechanical engineering services in Irvine28
- Mechanical engineering services in Las Vegas28
- Mechanical engineering services in Philadelphia26
- Mechanical engineering services in Pittsburgh25
Questions about this company list
What does Exact match mean for mechanical engineering services?
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 mechanical engineering services did RevenueBase find based in St. Louis, United States?
The saved snapshot records 29 matching company records, 1,140 tracked contacts and 642 verified emails. The public preview displays 15 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: November 6, 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
Mechanical engineering services by geography
- Mechanical engineering services based in Buenos Aires, Argentina
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Cite this list
RevenueBase Data Team. Top 15 mechanical engineering services based in St. Louis, United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/mechanical-engineering-services/united-states/st-louis.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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