Company lists · Data refreshed September 2026

Top 25 Systems engineering consultants based in Washington, United States

Name: Systems engineering consultants based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 50 companies tracked

RevenueBase identified 50 systems engineering consultants headquartered in Washington, United States as of September 2026 and tracks 1,505 professional contacts across them, including 406 with verified work emails. Houston is the largest hub.

This list covers systems engineering consultants headquartered in Washington, 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 18, 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 18, 2026 86% judged on-target in blind review

50Companies

1,505Contacts tracked

406Verified emails

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The 25 largest systems engineering consultants based in Washington, United States

Ranked by team size

Top 25 of 50 systems engineering consultants based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to systems engineering consultants: 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	Gryphon Technologies, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1,001-5,000	454 contacts →
	Indirect evidence “Gryphon Technologies - now part of ManTech, is headquartered in Washington DC.” Source: RevenueBase Database · checked Sep 18, 2026
2	CSSI	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	216 contacts →
	Indirect evidence “CSSI, LLC.” Source: RevenueBase Database · checked Sep 18, 2026
3	JRC Integrated Systems	Strong evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	199 contacts →
	Strong evidence “JRC Integrated Systems is a systems engineering consulting firm that provides scientific, engineering, and technical expertise to solve complex problems for the Department of…” Source: RevenueBase Database · checked Sep 18, 2026
4	Veracity Engineering	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	80 contacts →
	Partial evidence “Since 2001, Veracity Engineering has been successful in building, growing, and performing on a portfolio of technically challenging engineering and program management engagements…” Source: RevenueBase Database · checked Sep 18, 2026
5	Delon Hampton & Associates, Chartered	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	72 contacts →
	Partial evidence “Delon Hampton & Associates, Chartered (DHA), is a professional consulting engineering firm specializing in civil and structural engineering, as well as program and construction…” Source: RevenueBase Database · checked Sep 18, 2026
6	Els, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	60 contacts →
	Indirect evidence “ELS Inc.” Source: RevenueBase Database · checked Sep 18, 2026
7	Human Solutions Inc., A Division Of Oasis	Strong evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1,001-5,000	53 contacts →
	Strong evidence “Human Solutions Inc, a Division of Oasis Systems LLC, is a leading technical services company providing full life-cycle strategic consulting in systems engineering, enterprise…” Source: RevenueBase Database · checked Sep 18, 2026
8	Teknoluxion, A Division Of Bcore	Strong evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	47 contacts →
	Strong evidence “teKnoluxion provides specialized software & systems engineering, architecture, cloud services, IT advisory, and data analytics/visualization solutions to the DoD and IC.” Source: RevenueBase Database · checked Sep 18, 2026
9	Jackson And Tull	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	201-500	47 contacts →
	Partial evidence “Jackson and Tull is an award-winning engineering services and advanced technology company headquartered in Washington DC.” Source: RevenueBase Database · checked Sep 18, 2026
10	SZ PM Consultants, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	24 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026
11	Phaedrus Engineering	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	23 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 18, 2026
12	Avascent	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	20 contacts →
	Indirect evidence “Avascent is the leading management consulting firm specializing in serving senior executives in the defense, aerospace, healthcare, homeland security, logistics, technical…” Source: RevenueBase Database · checked Sep 18, 2026
13	Bfa, INC	Partial evidence	Washington, MO, United StatesHQ checked Sep 18, 2026	11-50	19 contacts →
	Partial evidence “BFA is a consulting civil engineering firm located in downtown Washington, Missouri.” Source: RevenueBase Database · checked Sep 18, 2026
14	Raye IT Consulting	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	19 contacts →
	Indirect evidence “Founded in 2015, Raye IT Consulting, LLC is an 8(a) certified Woman Owned Small Business headquartered in Raleigh NC with a location in Washington, DC.” Source: RevenueBase Database · checked Sep 18, 2026
15	Bluestonelogic	Strong evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	15 contacts →
	Strong evidence “BluestoneLogic is a pioneer in “integrated systems assessment”: leveraging government and industry market analysis and systems engineering expertise to provide immediate solutions…” Source: RevenueBase Database · checked Sep 18, 2026
16	Aurora-Innovations, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	14 contacts →
	Indirect evidence “A Think Ahead.” Source: RevenueBase Database · checked Sep 18, 2026
17	DRM International, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	7 contacts →
	Partial evidence “DRM International, Inc,(DRM) is a leading DIsadvantaged Business Enterprise (DBE) professional engineering consulting firm offering engineering, architectural, planning…” Source: RevenueBase Database · checked Sep 18, 2026
18	Stem Solutions, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	7 contacts →
	Indirect evidence “STEM Solutions is a mission-focused technical services provider supporting the Department of Defense, Intelligence Community, and federal integrators with cleared expertise in…” Source: RevenueBase Database · checked Sep 18, 2026
19	Grotheer & CO	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	5 contacts →
	Partial evidence “GROTHEER & CO, a small business located in Washington, DC, has been practicing professional engineering since 1954, and has completed thousands of projects for local and federal…” Source: RevenueBase Database · checked Sep 18, 2026
20	Wise Engineering Consulting LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	3 contacts →
	Partial evidence “We Simplify Weapons System Integration!” Source: RevenueBase Database · checked Sep 18, 2026
21	MC Global Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Partial evidence “International aerospace, defense & technology consultancy” Source: RevenueBase Database · checked Sep 18, 2026
22	The Impact Group, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Partial evidence “The Impact Group, LLC supports the mission and strategic goals of our customers in Engineering, Construction, and Information Technology.” Source: RevenueBase Database · checked Sep 18, 2026
23	Azul Engineering	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	2 contacts →
	Indirect evidence “Azul is an 8(a)-certified small business founded in 2011 based in the DC metro area.” Source: RevenueBase Database · checked Sep 18, 2026
24	Data Transformation Corp	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	2 contacts →
	Indirect evidence “Data Transformation Corp.(DTC), is an experienced, award-winning company dedicated to providing innovative IT solutions to the government and commercial business sectors by…” Source: RevenueBase Database · checked Sep 18, 2026
25	RI Engineering, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	1 contacts →
	Partial evidence “Engineering Consultation \| Building Commissioning \| Inspections \| Subject Matter Expertise DSLBD CBE Certified (12 Preference Points) MDOT Certified Certification#…” Source: RevenueBase Database · checked Sep 18, 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: systems engineering consultants. 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 systems engineering consultants.
Partial evidence: Its own public description names part of systems engineering consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name systems engineering consultants. 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 50 systems engineering consultants based in Washington, United States

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Systems engineering consultants based in Washington, United States at a glance

As of Sep 18, 2026

27.0%Verified-email coverage

30.1Average contacts per company

11-50Median size (employees)

232.0%Largest-city concentration · Houston

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 50 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 systems engineering consultants, 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 “systems engineering consultants”. 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 systems engineering consultants), 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 systems engineering consultants, 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, 406 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 18, 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.

Systems engineering consultants by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names systems engineering consultants, 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 systems engineering consultants are there based in Washington, United States?

RevenueBase identified 50 systems engineering consultants headquartered in Washington, 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?

Gryphon Technologies, INC, headquartered in Washington, tops this list with the largest team on record.

Which city has the most systems engineering consultants?

Houston leads with 116 headquartered companies, followed by New York (86) and Huntsville (78).

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 406 verified decision-maker contacts tracked across these 50 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 18, 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.