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30 leading companies with in-house R&D in Arlington

Tamtam tracks 39 companies with in-house R&D headquartered in Arlington. This list ranks the 30 largest by number of employees on LinkedIn, led by RTX, Boeing and Raytheon. Their median headcount is 768. Half of them were founded in 1969 or later.

馃嚭馃嚫 Arlington30 companiesUpdated Nov 12, 2026

These Arlington companies with in-house R&D are primarily large firms in the aviation, aerospace, and defense sectors. RTX, Boeing, Raytheon, Leonardo DRS, TSC, AV, and DARPA all operate in this sphere, developing advanced systems for military and commercial applications. The presence of the University of Texas at Arlington also highlights a strong connection to research and development.

Beyond defense, CoStar Group focuses on real estate information and analytics, while Accenture Federal Services provides IT consulting to the government. Fluence is active in renewable energy storage, and Oil States Industries offers equipment for energy and military markets. The concentration of defense and aerospace companies reflects a significant industry cluster in Arlington.

#CompanyIndustryHeadquarters EmployeesFounded
1
RTXrtx.com

Aerospace and defense operations through three business units focused on solving complex problems within aviation, space systems, and military technology sectors worldwide.

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Arlington 139,657 n/a
2
Boeingboeing.com

A global aerospace leader providing commercial airplanes, defense, space systems, and services, focused on innovation, customer delivery, and employee growth

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Arlington 129,130 1916
3
Raytheonrtx.com

Develops integrated air and missile defense, advanced sensors, space-based systems, hypersonics, and cyber solutions to provide next-generation protection and high-performance military effectors.

Defense and Space Manufacturing 馃嚭馃嚫 Arlington 48,589 1922
4
CoStar Groupcostargroup.com

A leading provider of online real estate marketplaces, information, and analytics for commercial and residential properties, with a global presence

Real Estate 馃嚭馃嚫 Arlington 11,725 1987
5
Accenture Federal Servicesaccenture.com

The company brings advanced R&D, latest technologies, and human-centered design to the federal government to create lasting value and drive positive change

IT Services and IT Consulting 馃嚭馃嚫 Arlington 9,719 n/a
6
The University of Texas at Arlingtonuta.edu

A growing research powerhouse committed to discovery, innovative instruction, and community engagement, improving quality of life in Texas and beyond

Higher Education 馃嚭馃嚫 Arlington 9,020 1895
7
Leonardo DRSleonardodrs.com

Providing advanced sensing, network computing, force protection, and electric power propulsion technologies to global national security customers through practical, high-performance defense innovation.

Defense and Space Manufacturing 馃嚭馃嚫 Arlington 6,551 1969
8
TSCtsc.com

An employee-owned high-tech company providing engineering services and specialized products to US Government agencies and private industry, supporting system life cycle from concept development to operations

Defense and Space Manufacturing 馃嚭馃嚫 Arlington 2,526 1966
9
AVavinc.com

Innovative solutions provider specializing in unmanned systems and high-altitude pseudo-satellites, empowering military and commercial customers with actionable intelligence for smarter decisions

Defense and Space Manufacturing 馃嚭馃嚫 Arlington 2,466 1971
10
Fluencefluenceenergy.com

Global leader in energy storage products and services, providing modular solutions, comprehensive services, and AI-enabled software for managing renewable energy and storage

Renewable Energy Semiconductor Manufacturing 馃嚭馃嚫 Arlington 1,962 2018
11
Oil States Industriesoilstates.com

A technology company advancing the energy future with innovative equipment, systems, and services for energy, industrial, and military markets worldwide

Oil and Gas 馃嚭馃嚫 Arlington 1,356 1942
12
SETsetcorp.com

A small business founded by DARPA scientists in 2002, specializing in creating and commercializing innovative "smart" information technologies for defense and intelligence clients

IT Services and IT Consulting 馃嚭馃嚫 Arlington 1,240 2002
13
NRECAelectric.coop

Promotes, supports, and protects interests of electric cooperatives; advocates for safe, reliable, affordable electric service; researches new energy technologies; promotes global rural electrification.

Non-profit Organizations 馃嚭馃嚫 Arlington 1,085 1942
14
Defense Advanced Research Projects Agency (DARPA)darpa.mil

Develops transformational defense and national security capabilities through academic, industrial, and government partnerships to create technological breakthroughs like precision weaponry and internet-scale civilian innovations.

Defense and Space Manufacturing 馃嚭馃嚫 Arlington 1,033 1958
15
Gerbernestlejobs.com

A leader in early childhood nutrition, providing research-based products, nutrition education, and services for infants and toddlers Joined Nestl茅 in 2007

Food and Beverage Retail 馃嚭馃嚫 Arlington 768 1927

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16
Iscar Metalsiscarmetals.com

Iscar Metals is a company that specializes in manufacturing metal cutting tools and providing innovative metalworking solutions to various industries

Industrial Machinery Manufacturing 馃嚭馃嚫 Arlington 703 1952
17
Tata Group - North Americatata.com

Global business group with diverse operations including IT services, consulting, steel production, luxury hotels, automotive engineering, mining, consumer brands, and philanthropic activities

Mechanical Or Industrial Engineering 馃嚭馃嚫 Arlington 699 1868
18
Two Six Technologiestwosixtech.com

Innovative company specializing in cyber, information operations, data science, electronic systems, and more to solve complex global challenges for various government agencies

Software Development 馃嚭馃嚫 Arlington 670 2021
19
Core4cecore4ce.com

Mission-oriented company serving national security community by building, modernizing, and defending digital infrastructure with expertise in cyber operations, modernization, engineering, and analysis

IT Services and IT Consulting 馃嚭馃嚫 Arlington 599 2019
20
BlueHalo, an AV companybluehalo.com

BlueHalo is a leading provider of cutting-edge defense solutions in Space, C-UAS, Autonomous Systems, Electronic Warfare & Cyber, and AI/ML

Defense and Space Manufacturing 馃嚭馃嚫 Arlington 575 2019
21
MicroPort Orthopedicsmicroportortho.com

A global orthopedic company focused on improving patient outcomes, provider satisfaction, and advancing knee and hip implants through innovation and superior clinical results

Medical Equipment Manufacturing 馃嚭馃嚫 Arlington 549 2014
22
Mack Molding Companymack.com

A Vermont-based company providing design, FDA-approved manufacturing services for medical, commercial, computer, energy, and transportation markets with expertise in injection molding and fabrication

Plastics Manufacturing 馃嚭馃嚫 Arlington 536 1920
23
Kito Crosbykitocrosby.com

Global leader in the lifting and securement industry, offering innovative products and solutions for demanding applications, with iconic brands and over 250 years of experience

Manufacturing 馃嚭馃嚫 Arlington 516 n/a
24
Safran Defense & Space, Inc.safran-dsi.com

Provides top-notch solutions for Defense and Space applications to meet the needs of U.S. customers.

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Arlington 478 n/a
25
Office of Naval Researchnre.navy.mil

Leading provider of science and technology for the Department of the Navy, ensuring technological advantage for the Navy and Marine Corps worldwide

Armed Forces 馃嚭馃嚫 Arlington 472 1946
26
Leidos Gibbs & Coxgibbscox.com

An engineering and design firm specializing in naval architecture, marine engineering, and consulting for government and commercial maritime programs

Maritime Transportation 馃嚭馃嚫 Arlington 396 1929
27
Innovative Defense Technologies (IDT)idtus.com

Automated software testing, data analysis, and cybersecurity solutions for DOD's mission-critical systems, enabling faster, more affordable software capabilities deployment

IT Services and IT Consulting 馃嚭馃嚫 Arlington 381 2006
28
FCi Federalamentum.com

A company providing federal services has joined PAE, now connecting through LinkedIn at wwwlinkedincom/company/pae

Government Administration 馃嚭馃嚫 Arlington 362 1991
29
Salcomp Manufacturing USAsalcomp.com

Provides advanced power solutions and high-precision electronics manufacturing from its Arlington, Texas, facility. Supports global tech and energy companies, strengthening North American presence.

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Arlington 355 1973
30
Millenniummillgroupinc.com

A cybersecurity company with over 400 experts specializing in Red Team Operations, Defensive Cyber Operations, Software Engineering, and Technical Engineering

IT Services and IT Consulting 馃嚭馃嚫 Arlington 346 2004

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

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