Company lists · Data refreshed September 2026

Top 25 Construction compliance consulting firms based in the United States

Name: Construction compliance consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 3,020 companies tracked

RevenueBase identified 3,020 construction compliance consulting firms headquartered in the United States as of September 2026 and tracks 39,553 professional contacts across them, including 18,117 with verified work emails. New York is the largest hub.

This list covers construction compliance consulting firms headquartered in the 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 27, 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 27, 2026 86% judged on-target in blind review

3,020Companies

39,553Contacts tracked

18,117Verified emails

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The 25 largest construction compliance consulting firms based in the United States

Ranked by team size

Top 25 of 3,020 construction compliance consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to construction compliance 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	Partner Engineering & Science, INC	Indirect evidence	Torrance, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,358 contacts →
	Indirect evidence “Partner Assessment Corp.” Source: RevenueBase Database · checked Sep 27, 2026
2	Apex Companies	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,137 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 27, 2026
3	IEA	Partial evidence	Brooklyn Park, MN, United StatesHQ checked Sep 27, 2026	n/a	982 contacts →
	Partial evidence “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Source: RevenueBase Database · checked Sep 27, 2026
4	Trinity Consultants	Partial evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	961 contacts →
	Partial evidence “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Source: RevenueBase Database · checked Sep 27, 2026
5	Simpson Gumpertz & Heger SGH	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 27, 2026	501-1,000	942 contacts →
	Indirect evidence “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Source: RevenueBase Database · checked Sep 27, 2026
6	Environmental Science Associates	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	501-1,000	732 contacts →
	Partial evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 27, 2026
7	Antea Group USA	Partial evidence	St Paul, MN, United StatesHQ checked Sep 27, 2026	1,001-5,000	658 contacts →
	Partial evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 27, 2026
8	EBI Consulting	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 27, 2026	501-1,000	535 contacts →
	Indirect evidence “For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…” Source: RevenueBase Database · checked Sep 27, 2026
9	AM Technical Solutions, INC	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	527 contacts →
	Partial evidence “AM Technical Solutions (AM), founded in 1994, is a proven and licensed architect, engineering, construction and commissioning firm.” Source: RevenueBase Database · checked Sep 27, 2026
10	Nova Engineering And Environmental, LLC	Strong evidence	Kennesaw, GA, United StatesHQ checked Sep 27, 2026	501-1,000	518 contacts →
	Strong evidence “Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Source: RevenueBase Database · checked Sep 27, 2026
11	Rincon Consultants	Partial evidence	Ventura, CA, United StatesHQ checked Sep 27, 2026	501-1,000	479 contacts →
	Partial evidence “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Source: RevenueBase Database · checked Sep 27, 2026
12	Groundwater & Environmental Services, INC	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 27, 2026	201-500	447 contacts →
	Indirect evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 27, 2026
13	P2s	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 27, 2026	201-500	375 contacts →
	Indirect evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 27, 2026
14	MKA International, INC	Strong evidence	Walnut Creek, CA, United StatesHQ checked Sep 27, 2026	201-500	332 contacts →
	Strong evidence “MKA International, Inc.(MKA) a leading multidisciplinary Construction & Engineering Consulting firm, providing seamless support and specialized services to a wide variety of…” Source: RevenueBase Database · checked Sep 27, 2026
15	Trileaf Corporation	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 27, 2026	201-500	211 contacts →
	Indirect evidence “Quality work and quick responses - Trileaf gives you both.” Source: RevenueBase Database · checked Sep 27, 2026
16	August Mack Environmental, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 27, 2026	51-200	210 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
17	Hillmann Consulting, LLC	Partial evidence	Union, NJ, United StatesHQ checked Sep 27, 2026	201-500	209 contacts →
	Partial evidence “Hillmann has been a well-recognized leader in the Environmental Health & Safety, Due Diligence & Remediation Management, and Construction Services industries since 1985.” Source: RevenueBase Database · checked Sep 27, 2026
18	MC Consultants	Strong evidence	Carlsbad, CA, United StatesHQ checked Sep 27, 2026	51-200	196 contacts →
	Strong evidence “Since 1989, MC’s team of professional consultants have leveraged their extensive construction backgrounds to deliver industry-leading construction consulting and forensic…” Source: RevenueBase Database · checked Sep 27, 2026
19	ATANE	Partial evidence	NY, United StatesHQ checked Sep 27, 2026	201-500	194 contacts →
	Partial evidence “From humble beginnings in 1991 as a 2-person company in New York City, we have now grown into a 500-person strong consulting firm, with 15 regional offices in the US (and India).” Source: RevenueBase Database · checked Sep 27, 2026
20	Normandeau Associates, INC	Indirect evidence	Bedford, NH, United StatesHQ checked Sep 27, 2026	201-500	189 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
21	Smith Currie Oles LLP	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	51-200	184 contacts →
	Partial evidence “Smith Currie Oles (SCO) provides comprehensive legal services to all parts of the construction industry.” Source: RevenueBase Database · checked Sep 27, 2026
22	Milrose Consultants	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	174 contacts →
	Strong evidence “Milrose is the nation’s premier building lifecycle firm, offering fully integrated services in Permitting, Code Consulting, Municipal Compliance, Special Inspections…” Source: RevenueBase Database · checked Sep 27, 2026
23	Terraphase Engineering INC	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 27, 2026	201-500	166 contacts →
	Indirect evidence “Terraphase offers cost-effective solutions to complex environmental and engineering challenges.” Source: RevenueBase Database · checked Sep 27, 2026
24	Ecorp Consulting, INC	Indirect evidence	Rocklin, CA, United StatesHQ checked Sep 27, 2026	51-200	166 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
25	HB Next	Strong evidence	Lawrenceville, GA, United StatesHQ checked Sep 27, 2026	201-500	161 contacts →
	Strong evidence “From safety software to stormwater inspections, trust HB NEXT to take the risk out of construction compliance, so you can focus on building.” Source: RevenueBase Database · checked Sep 27, 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: construction compliance 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 construction compliance consulting firms.
Partial evidence: Its own public description names part of construction compliance consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name construction compliance 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 3,020 construction compliance consulting firms based in the United States

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Construction compliance consulting firms based in the United States at a glance

As of Sep 27, 2026

45.8%Verified-email coverage

13.1Average contacts per company

1-10Median size (employees)

4.6%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,833

11-50

942

51-200

190

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,020 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 construction compliance 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 the United States whose own description of what they do matches “construction compliance 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 construction compliance 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 construction compliance consulting firms, and records with no verified work email. Companies headquartered outside United States 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, 18,117 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 27, 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.

Construction compliance consulting firms by metro

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 construction compliance 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 construction compliance consulting firms are there based in the United States?

RevenueBase identified 3,020 construction compliance consulting firms headquartered in the 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?

Partner Engineering & Science, INC, headquartered in Torrance, tops this list with the largest team on record.

Which city has the most construction compliance consulting firms?

New York leads with 140 headquartered companies, followed by Houston (76) and Denver (34).

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 18,117 verified decision-maker contacts tracked across these 3,020 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 27, 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.