Company lists · Data refreshed September 2026

Top 25 Engineering companies based in Washington, United States

Name: Engineering companies based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 103 companies tracked

This directory lists 103 engineering companies based in Washington, United States, with 3,041 contacts and 890 email addresses. The list includes companies across engineering disciplines, and Houston is the single most-represented city among the companies on the list. Use it to identify potential suppliers, partners, and sales prospects as of September 2026.

Engineering companies apply scientific, mathematical, and technical principles to design, develop, test, and manage products, systems, structures, or industrial processes. This list covers companies that provide engineering design, consulting, testing, project management, or related technical services. Ranked by team size, largest first. Data current as of September 6, 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 6, 2026 86% judged on-target in blind review

103Companies

3,041Contacts tracked

890Verified emails

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The 25 largest engineering companies based in Washington, United States

Ranked by team size

Top 25 of 103 engineering companies based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to 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	PAGE	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,191 contacts →
	“Performance by Design.” Source: company website · checked Sep 6, 2026
2	Setty & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	201-500	220 contacts →
	“Established in 1984, SETTY is headquartered in Fairfax, VA, with offices in Atlanta, GA, Baltimore, MD, Charlottesville, VA, Fairfax, VA, Los Angeles, CA, New York, NY…” Source: company website · checked Sep 6, 2026
3	Fort Myer Construction Corporation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	501-1,000	213 contacts →
	“Fort Myer Construction Corporation is an award-winning, ENR-Ranked Top 400 Contractor in the Washington, DC metropolitan area, focusing on an array of infrastructure construction…” Source: company website · checked Sep 6, 2026
4	Mckissack & Mckissack	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	175 contacts →
	“McKissack & McKissack is a national architectural, engineering, program and construction management firm with 30 years of experience working with clients to envision and deliver…” Source: company website · checked Sep 6, 2026
5	Axiem International	Strong evidence	Washington, MI, United StatesHQ checked Sep 6, 2026	201-500	141 contacts →
	“For more than 18 years, Axiem International has provided the highest quality Engineering deliverables and professionals to the Energy, Aerospace, Automotive & Industrial…” Source: company website · checked Sep 6, 2026
6	Veracity Engineering	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	80 contacts →
	“Since 2001, Veracity Engineering has been successful in building, growing, and performing on a portfolio of technically challenging engineering and program management engagements…” Source: company website · checked Sep 6, 2026
7	Delon Hampton & Associates, Chartered	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	72 contacts →
	“Delon Hampton & Associates, Chartered (DHA), is a professional consulting engineering firm specializing in civil and structural engineering, as well as program and construction…” Source: company website · checked Sep 6, 2026
8	B360 Bizsolutions 360 INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	201-500	58 contacts →
	“BizSolutions 360 Inc.” Source: company website · checked Sep 6, 2026
9	Hayat Brown LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	50 contacts →
	“Comprised of experienced, savvy professionals, Hayat Brown provides services in engineering and P3, real estate and infrastructure advisory.” Source: company website · checked Sep 6, 2026
10	Jackson And Tull	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	201-500	47 contacts →
	“Jackson and Tull is an award-winning engineering services and advanced technology company headquartered in Washington DC.” Source: company website · checked Sep 6, 2026
11	Global Engineering Solutions	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	44 contacts →
	“Global Engineering Solutions is an Engineering, Program Management and Construction Management firm specializing in Mechanical, Electrical, Plumbing and Fire Protection…” Source: company website · checked Sep 6, 2026
12	Cube Root Corporation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	34 contacts →
	“Cube Root Corporation is a professional services firm offering a range of services including design, program management, construction management, facilities management, and other…” Source: company website · checked Sep 6, 2026
13	FMC & Associates LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	32 contacts →
	“FMC & ASSOCIATES LLC is a civil engineering company based out of Washington, DC and provides specialty engineering consulting services, construction material testing and…” Source: company website · checked Sep 6, 2026
14	Wiles Mensch	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	29 contacts →
	“Wiles Mensch (WM) is a certified small business providing land development and design services for projects across all sectors worldwide.” Source: company website · checked Sep 6, 2026
15	Prime Partners Engineering	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	27 contacts →
	“We strive to be an industry leader by offering clients superior expertise, cutting-edge solutions and forward-thinking design in all their projects-from the most basic to the most…” Source: company website · checked Sep 6, 2026
16	Amar Group, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	1-10	27 contacts →
	“AMAR Group, LLC is a full service architecture, civil engineering, facility assessement and Certified Third Party Inspection Company.” Source: company website · checked Sep 6, 2026
17	SZ PM Consultants, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	24 contacts →
	Source: company website · checked Sep 6, 2026
18	Phaedrus Engineering	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	1-10	23 contacts →
	“Phaedrus is a small engineering company located in the DC Metro Area, serving the DoD, academia, and private sector with professional skills for design, architecture, and…” Source: company website · checked Sep 6, 2026
19	North Arrow, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	22 contacts →
	“DUNS Number: 08-001-8268 CAGE Code: 7GN69 SBA Certified Small Business District of Columbia Certified Business Enterprise (CBE) Metropolitan Washington Airports Authority Local…” Source: company website · checked Sep 6, 2026
20	Alphatec PC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	22 contacts →
	“Alphatec PC is a full service A/E firm located in Dupont Circle and has been providing design and consulting services for over 50 years.” Source: company website · checked Sep 6, 2026
21	Bfa, INC	Strong evidence	Washington, MO, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“BFA is a consulting civil engineering firm located in downtown Washington, Missouri.” Source: company website · checked Sep 6, 2026
22	Foxxstem	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“FOXXSTEM is a professional engineering consulting firm that inspires and creates infrastructure that connects people to communities and communities to opportunities for better…” Source: company website · checked Sep 6, 2026
23	Vika Capitol, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“VIKA Capitol, LLC, a District of Columbia Certified Business Enterprise (CBE), provides land development engineering, surveying, planning, and landscape architectural services.” Source: company website · checked Sep 6, 2026
24	Interagency INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“InterAgency provides preconstruction consulting for the Washington Metro Area’s most complex and challenging infrastructure projects.” Source: company website · checked Sep 6, 2026
25	Harshman CE Group, LLC	Strong evidence	Washington, PA, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“We are a full service Professional Engineering consulting firm providing civil site and infrastructure design, professional land surveying, facility design, and permitting support…” Source: company website · checked Sep 6, 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: 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 engineering companies.
Partial evidence: Its own public description names part of engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name 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 103 engineering companies based in Washington, United States

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Engineering companies based in Washington, United States at a glance

As of Sep 6, 2026

29.3%Verified-email coverage

29.5Average contacts per company

11-50Median size (employees)

703.9%Largest-city concentration · Houston

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 103 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 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 Washington, United States whose own description of what they do matches “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 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 engineering companies, and records with no verified work email. Companies headquartered outside Washington 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, 890 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 6, 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.

Engineering companies by metro in the United States

Frequently asked

How many engineering companies are based in Washington, United States?

The directory lists 103 engineering companies based in Washington, United States as of September 2026.

What services do engineering companies provide?

Engineering companies provide services such as design, consulting, testing, project management, and technical support across disciplines and industries.

How can I find contacts at engineering companies?

This directory includes 3,041 contacts and 890 email addresses associated with engineering companies.

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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.