Company lists · Data refreshed September 2026

Top 25 Air consulting and engineering companies based in the United States

Name: Air consulting and engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,464 companies tracked

RevenueBase identified 1,464 air consulting and engineering companies headquartered in the United States as of September 2026 and tracks 65,027 professional contacts across them, including 28,284 with verified work emails. New York is the largest hub.

This list covers air consulting and engineering companies 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 21, 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 21, 2026 86% judged on-target in blind review

1,464Companies

65,027Contacts tracked

28,284Verified emails

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The 25 largest air consulting and engineering companies based in the United States

Ranked by team size

Top 25 of 1,464 air consulting and engineering companies based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to air consulting and engineering companies: 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	Ch2m	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 21, 2026	10001+	8,088 contacts →
	Indirect evidence “CH2M is now Jacobs.” Source: RevenueBase Database · checked Sep 21, 2026
2	Power Engineers	Indirect evidence	Hailey, ID, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,013 contacts →
	Indirect evidence “POWER Engineers is now part of WSP.” Source: RevenueBase Database · checked Sep 21, 2026
3	Geosyntec Consultants	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,393 contacts →
	Strong evidence “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Source: RevenueBase Database · checked Sep 21, 2026
4	ECS Group Of Companies	Strong evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,210 contacts →
	Strong evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 21, 2026
5	Civil & Environmental Consultants, INC	Partial evidence	Moon Township, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,145 contacts →
	Partial evidence “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Source: RevenueBase Database · checked Sep 21, 2026
6	Olsson	Partial evidence	Lincoln, NE, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,108 contacts →
	Partial evidence “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Source: RevenueBase Database · checked Sep 21, 2026
7	Colliers Engineering & Design	Strong evidence	Holmdel, NJ, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,049 contacts →
	Strong evidence “Colliers Engineering & Design, an affiliate of Colliers, is a trusted provider of multi-discipline engineering and architecture, design and consulting services to public and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Exponent	Strong evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,560 contacts →
	Strong evidence “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Source: RevenueBase Database · checked Sep 21, 2026
9	Garver	Partial evidence	North Little Rock, AR, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,499 contacts →
	Partial evidence “Founded in 1919, Garver is an employee-owned engineering, planning, and environmental services firm focused on aviation, transportation, buildings, federal, water and wastewater…” Source: RevenueBase Database · checked Sep 21, 2026
10	Volkert, INC	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,199 contacts →
	Indirect evidence “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Source: RevenueBase Database · checked Sep 21, 2026
11	Haley & Aldrich	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 21, 2026	501-1,000	1,124 contacts →
	Indirect evidence “Haley & Aldrich is committed to solving our clients’ most meaningful challenges in the built and natural environments.” Source: RevenueBase Database · checked Sep 21, 2026
12	WSB	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Forge ahead.” Source: RevenueBase Database · checked Sep 21, 2026
13	Pond & Company	Strong evidence	Peachtree Corners, GA, United StatesHQ checked Sep 21, 2026	501-1,000	985 contacts →
	Strong evidence “Pond, an ENERCON company, is a full-service consulting firm that has provided integrated engineering, architecture, planning, and construction management solutions to public and…” Source: RevenueBase Database · checked Sep 21, 2026
14	GAI Consultants, INC	Strong evidence	Homestead, PA, United StatesHQ checked Sep 21, 2026	501-1,000	964 contacts →
	Strong evidence “Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…” Source: RevenueBase Database · checked Sep 21, 2026
15	ATC Group Services LLC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 21, 2026	1,001-5,000	865 contacts →
	Indirect evidence “ATC Group Services LLC is now Atlas.” Source: RevenueBase Database · checked Sep 21, 2026
16	The Foth Companies	Partial evidence	De Pere, WI, United StatesHQ checked Sep 21, 2026	501-1,000	781 contacts →
	Partial evidence “By combining science, engineering, and technology with a true collaborative spirit, Foth has delivered innovative solutions to our clients since 1938.” Source: RevenueBase Database · checked Sep 21, 2026
17	Psomas	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	501-1,000	748 contacts →
	Indirect evidence “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Source: RevenueBase Database · checked Sep 21, 2026
18	Ghafari Associates	Indirect evidence	Dearborn, MI, United StatesHQ checked Sep 21, 2026	501-1,000	670 contacts →
	Indirect evidence “An innovator since 1982, Ghafari embraces an integrated design approach to deliver solutions that synergize building operations, systems, and people.” Source: RevenueBase Database · checked Sep 21, 2026
19	Whitman, Requardt And Associates, LLP	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 21, 2026	501-1,000	601 contacts →
	Partial evidence “Established in 1915, WRA is a nationally-recognized engineering, architectural and environmental planning firm with a reputation for delivering exceptional work on time and within…” Source: RevenueBase Database · checked Sep 21, 2026
20	Hanson Professional Services INC	Partial evidence	Springfield, IL, United StatesHQ checked Sep 21, 2026	501-1,000	584 contacts →
	Partial evidence “Hanson specializes in engineering, planning and a range of allied services.” Source: RevenueBase Database · checked Sep 21, 2026
21	Trihydro Corporation	Strong evidence	Laramie, WY, United StatesHQ checked Sep 21, 2026	501-1,000	577 contacts →
	Strong evidence “Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Source: RevenueBase Database · checked Sep 21, 2026
22	V3 Companies	Indirect evidence	Woodridge, IL, United StatesHQ checked Sep 21, 2026	201-500	506 contacts →
	Indirect evidence “V3 is your partner in reimagining our built and natural world.” Source: RevenueBase Database · checked Sep 21, 2026
23	Bastion Technologies, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	501-1,000	476 contacts →
	Partial evidence “Bastion Technologies is a multi-disciplined engineering and technical services company headquartered in Houston, Texas.” Source: RevenueBase Database · checked Sep 21, 2026
24	Lockwood, Andrews & Newnam, Inc. LAN	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	461 contacts →
	Strong evidence “Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.” Source: RevenueBase Database · checked Sep 21, 2026
25	Strand Associates, INC	Indirect evidence	Madison, WI, United StatesHQ checked Sep 21, 2026	501-1,000	443 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 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: air consulting and engineering companies. 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 air consulting and engineering companies.
Partial evidence: Its own public description names part of air consulting and engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name air consulting and engineering companies. 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 1,464 air consulting and engineering companies based in the United States

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Air consulting and engineering companies based in the United States at a glance

As of Sep 21, 2026

43.5%Verified-email coverage

44.4Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

794

11-50

406

51-200

168

201-500

501-1,000

1,001-5,000

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 1,464 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 air consulting and engineering companies, 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 “air consulting and engineering companies”. 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 air consulting and engineering companies), 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 air consulting and engineering companies, 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, 28,284 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 21, 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.

Air consulting and engineering companies by metro

Air consulting and engineering companies in New York33
Air consulting and engineering companies in Houston25

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 air consulting and engineering companies, 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 air consulting and engineering companies are there based in the United States?

RevenueBase identified 1,464 air consulting and engineering companies 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?

Ch2m, headquartered in Englewood, tops this list with the largest team on record.

Which city has the most air consulting and engineering companies?

New York leads with 33 headquartered companies, followed by Houston (25) and Miami (22).

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 28,284 verified decision-maker contacts tracked across these 1,464 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 21, 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.