Company lists · Data refreshed September 2026

Top 25 Systems engineering software companies based in the United States

Name: Systems engineering software 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 6, 2026 372 companies tracked

RevenueBase identified 372 systems engineering software companies headquartered in the United States as of September 2026 and tracks 15,763 professional contacts across them, including 2,578 with verified work emails and 5,342 with mobile numbers. Huntsville is the largest hub.

This list covers systems engineering software 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 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

372Companies

15,763Contacts tracked

2,578Verified emails

5,342Mobile numbers

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The 25 largest systems engineering software companies based in the United States

Ranked by team size

Top 25 of 372 systems engineering software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to systems engineering software 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	Scientific Research Corporation	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,917 contacts →
	“Scientific Research Corporation is an advanced engineering company that was founded in 1988 to provide innovative solutions to the U.S.” Source: company website · checked Sep 6, 2026
2	ESI Group	Partial evidence	Santa Rosa, CA, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,673 contacts →
	“Keysight Computer Aided Engineering (CAE): Simulate real-world performance before building a single prototype.” Source: company website · checked Sep 6, 2026
3	Intergraph	Partial evidence	Madison, AL, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,365 contacts →
	“Octave provides mission-critical software that empowers organizations to make informed decisions across every stage of the asset lifecycle, Design, Build, Operate and Protect -…” Source: company website · checked Sep 6, 2026
4	ARI	Strong evidence	East Peoria, IL, United StatesHQ checked Sep 6, 2026	1,001-5,000	979 contacts →
	“ARi is a global engineering firm headquartered in East Peoria, Illinois, USA offering services for: Embedded Software, Product Engineering, Manufacturing Engineering and Testing &…” Source: company website · checked Sep 6, 2026
5	MSC Software	Strong evidence	Newport Beach, CA, United StatesHQ checked Sep 6, 2026	1,001-5,000	633 contacts →
	“MSC Software, part of Cadence's physical systems simulation division, is one of the ten original software companies and a global leader in helping product manufacturers to advance…” Source: company website · checked Sep 6, 2026
6	AGI Analytical Graphics, INC	Partial evidence	Exton, PA, United StatesHQ checked Sep 6, 2026	201-500	516 contacts →
	“Analytical Graphics, Inc, acquired by Ansys in 2020, develops commercial modeling and analysis software for engineers, operators, and analysts working on land, sea, air, and space…” Source: company website · checked Sep 6, 2026
7	Innovative Defense Technologies IDT	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 6, 2026	201-500	389 contacts →
	“Innovative Defense Technologies (IDT) is a rapid capability integrator helping the U.S.” Source: company website · checked Sep 6, 2026
8	SCCI	Strong evidence	Frederick, MD, United StatesHQ checked Sep 6, 2026	201-500	383 contacts →
	“SCCI provides systems engineering, information assurance, software engineering, logistics, and training services in support of complex, software intensive military systems.” Source: company website · checked Sep 6, 2026
9	Seacorp	Partial evidence	Middletown, RI, United StatesHQ checked Sep 6, 2026	501-1,000	366 contacts →
	“Over 40 years old and headquartered in Rhode Island near Newport's First Beach, SEACORP employs the highest quality people to provide vital information technology and engineering…” Source: company website · checked Sep 6, 2026
10	Triple Crown	Partial evidence	Austin, TX, United StatesHQ checked Sep 6, 2026	51-200	322 contacts →
	“Triple Crown delivers engineering, verification and design services that move the world forward, one precisely managed and expertly executed project at a time.” Source: company website · checked Sep 6, 2026
11	Jama Software	Partial evidence	Portland, OR, United StatesHQ checked Sep 6, 2026	201-500	290 contacts →
	“Jama Connect® is the #1 Rated Requirements Management Software and Proven Requirements Traceability Solution.” Source: company website · checked Sep 6, 2026
12	Iengineering	Strong evidence	Chantilly, VA, United StatesHQ checked Sep 6, 2026	51-200	278 contacts →
	“Founded in iENGINEERING Corporation is a privately-owned global information-engineering firm specializing in the development of engineering software and collaborative e-business…” Source: company website · checked Sep 6, 2026
13	Stellar Solutions	Partial evidence	Los Altos, CA, United StatesHQ checked Sep 6, 2026	201-500	261 contacts →
	“Stellar Solutions is an engineering services company providing end-to-end technical expertise and problem solving skills to significant national and international aerospace…” Source: company website · checked Sep 6, 2026
14	NO Magic, INC	Indirect evidence	Allen, TX, United StatesHQ checked Sep 6, 2026	201-500	233 contacts →
	“A leading provider of business/architecture modeling solutions for 19+ years with its MagicDraw® and Cameo™ product lines supporting the full development life-cycle of your…” Source: company website · checked Sep 6, 2026
15	Praxis Engineering	Strong evidence	Annapolis Junction, MD, United StatesHQ checked Sep 6, 2026	201-500	232 contacts →
	“Praxis Engineering, a General Dynamics Information Technology (GDIT) Company, headquartered in Annapolis Junction, Maryland, focuses on the practical application of software and…” Source: company website · checked Sep 6, 2026
16	Tybrin Corporation	Strong evidence	Fort Walton Beach, FL, United StatesHQ checked Sep 6, 2026	1,001-5,000	208 contacts →
	“Founded in 1972, purchased by Jacobs Technologies in 2009, TYBRIN is a premier provider of process-based systems and software engineering products and services.” Source: company website · checked Sep 6, 2026
17	JRC Integrated Systems	Strong evidence	Washington, DC, United StatesHQ checked Sep 6, 2026	51-200	199 contacts →
	“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: company website · checked Sep 6, 2026
18	CTI	Strong evidence	Prince Frederick, MD, United StatesHQ checked Sep 6, 2026	201-500	166 contacts →
	“CTI, a Parsons Company, is a high-tech software, systems engineering, and operational support corporation dedicated to providing cutting-edge engineering, and system development…” Source: company website · checked Sep 6, 2026
19	Syntech Systems - Fuelmaster	Partial evidence	Tallahassee, FL, United StatesHQ checked Sep 6, 2026	51-200	157 contacts →
	“Syntech Systems, Inc.” Source: company website · checked Sep 6, 2026
20	Tech Wizards	Strong evidence	King George, VA, United StatesHQ checked Sep 6, 2026	51-200	148 contacts →
	“Tech Wizards is a system and software engineering company that combines creativity, engineering and experienced management to provide innovative, high-quality system and software…” Source: company website · checked Sep 6, 2026
21	Axiologic Solutions LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	117 contacts →
	“Founded in 2009 and based out of the Washington, D.C.” Source: company website · checked Sep 6, 2026
22	Invariant Corporation	Indirect evidence	Huntsville, AL, United StatesHQ checked Sep 6, 2026	201-500	112 contacts →
	“Invariant Corporation was founded in 2001 by David Anderson, Brent Spears, and Brett Gossage.” Source: company website · checked Sep 6, 2026
23	Strata-G Solutions, LLC	Strong evidence	Huntsville, AL, United StatesHQ checked Sep 6, 2026	51-200	105 contacts →
	“Strata-G Solutions provides unrivaled competency in test-system engineering to both commercial and military customers.” Source: company website · checked Sep 6, 2026
24	Metecs	Partial evidence	Houston, TX, United StatesHQ checked Sep 6, 2026	51-200	99 contacts →
	“METECS is a small engineering-services company headquartered in Houston Texas near NASA's Johnson Space Center.” Source: company website · checked Sep 6, 2026
25	Ispa Technology	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 6, 2026	51-200	88 contacts →
	“In today's digital and network-centric environment, the need to store, manage, interpret, move, manipulate, and secure vast amounts of data is increasing at a rapid rate.” 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: systems engineering software 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 systems engineering software companies.
Partial evidence: Its own public description names part of systems engineering software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name systems engineering software 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 372 systems engineering software companies based in the United States

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Systems engineering software companies based in the United States at a glance

As of Sep 6, 2026

16.4%Verified-email coverage

33.9%Mobile-number coverage

42.4Average contacts per company

11-50Median size (employees)

3.5%Largest-city concentration · Huntsville

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

185

11-50

103

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

2,3380–30

16831–60

161–90

290–180

69180+

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 software 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 “systems engineering software 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 systems engineering software 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 systems engineering software 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, 2,578 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.

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 software 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 systems engineering software companies are there based in the United States?

RevenueBase identified 372 systems engineering software 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?

Scientific Research Corporation, headquartered in South Atlanta, tops this list with the largest team on record.

Which city has the most systems engineering software companies?

Huntsville leads with 13 headquartered companies, followed by San Diego (13) and San Francisco (9).

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 2,578 verified decision-maker contacts tracked across these 372 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 6, 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.