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Top 28 aerospace and defence companies in San Diego

Tamtam tracks 28 aerospace and defence companies headquartered in San Diego. This list ranks all of them by number of employees on LinkedIn, led by General Atomics, NAVWAR and SPAWAR. Their median headcount is 442. Half of them were founded in 1997 or later.

๐Ÿ‡บ๐Ÿ‡ธ San Diego28 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
General Atomicsga.com

Development of advanced technology solutions including unmanned aerial vehicles, research reactors, aircraft systems, MagLev transport, and fusion energy for global customers.

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 11,213 n/a
2
NAVWARnavwar.navy.mil

This company specializes in providing information warfare capabilities and services to support naval, joint, coalition, and national missions

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 3,228 1997
3
SPAWARnavy.mil

A global organization specializing in developing and providing information warfare capabilities and services for naval, joint, coalition, and national missions

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 3,123 1985
4
Cubic Corporationcubic.com

The company creates technology solutions in transportation to simplify daily journeys and defense capabilities to promote mission success and safety

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ San Diego 3,095 n/a
5
Kratos Defense and Security Solutionskratosdefense.com

National security technologies spanning unmanned systems, hypersonics, satellite communications, cyber defense, and propulsion systems for rapid deployment to support various military domain missions.

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 2,950 n/a
6
General Dynamics NASSCOjobs.nassco.com

A shipbuilding company with locations on the West and East Coasts specializing in ships for the US Navy and commercial markets, also providing repair services

Shipbuilding ๐Ÿ‡บ๐Ÿ‡ธ San Diego 1,845 1959
7
Shield AIshield.ai

A venture-backed defense technology company developing intelligent systems to protect service members and civilians through AI pilots and products

Software Development ๐Ÿ‡บ๐Ÿ‡ธ San Diego 1,569 2015
8
All Starall-star.com

A privately owned firm specializing in aerospace support, facilities maintenance, military housing, logistics, construction, and fleet maintenance for military, government, and commercial contracts

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 1,501 1983
9
Naval Information Warfare Center Pacificniwcpacific.navy.mil

A technological support center for the US military branches, specializing in information warfare, cyber domain, autonomous unmanned systems, and communication technologies

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 1,266 1940
10
Epsilon Systems Solutions, Inc.epsilonsystems.com

A diversified professional services company serving defense and commercial customers worldwide, specializing in ship modernization, technical solutions, and mission readiness support

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 686 1998
11
Fleet Readiness Center Southwestnavair.navy.mil

Premier maintenance organization in the Department of Defense, specializing in aircraft and ship engine repair to support the Marines and Navy

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 547 1919
12
Cubic Defensecubic.com

This company delivers technology-driven solutions for C5ISR and training customers worldwide, specializing in C4ISR solutions for all-domain operations and advanced training innovations

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 486 1951
13
Southwest Regional Maintenance Centernavsea.navy.mil

A dynamic force delivering safe, cost-effective, and innovative solutions to maintain and modernize ships for the United States Navy

Armed Forces ๐Ÿ‡บ๐Ÿ‡ธ San Diego 465 n/a
14
Tapestry Solutionstapestrysolutions.com

Global provider of information management software and services for defense, government, and commercial customers, specializing in solving logistics challenges and enhancing mission readiness for military forces worldwide

Transportation, Logistics, Supply Chain and Storage ๐Ÿ‡บ๐Ÿ‡ธ San Diego 442 1981
15
INDUS Technology, Inc.industechnology.com

Provider of C4I capabilities and support services to the Federal government and industry, including engineering, IT, logistics, program management, and financial management ISO 9001:2008 certified

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 439 1991
16
ATA Engineeringata-e.com

Innovative engineering solutions using test, analysis, and computer-aided engineering to address manufacturers' challenges in aerospace, mechanical, and other industries

Engineering Services ๐Ÿ‡บ๐Ÿ‡ธ San Diego 240 2000
17
InnovaSystems International, LLCwebsite-redirect.cydecor.com

Developing innovative software solutions supporting national security strategy by optimizing data sources, reducing costs, and providing premier customer service

Software Development ๐Ÿ‡บ๐Ÿ‡ธ San Diego 222 n/a
18
Rock West Compositesrockwestcomposites.com

Designs, engineers, and manufactures quality composite products using various techniques, ensuring superior value and customer satisfaction with experienced personnel.

Aviation and Aerospace Component Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 209 2009
19
Affordable Engineering Servicesaffordservices.com

A premier defense contractor providing high-quality engineering and aviation maintenance services to support warfighter-readiness and military missions worldwide

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 209 1996
20
Innoflightinnoflight.com

A non-traditional defense contractor specializing in secure C4 design, offering compact radios, avionics systems, and data storage solutions for government and commercial clients

Aviation and Aerospace Component Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 172 2004
21
Quartus Engineeringquartus.com

Multi-disciplinary team delivering high precision, reliable engineered solutions in analysis, testing, metrology, robotics, and optical systems across industries.

Engineering Services ๐Ÿ‡บ๐Ÿ‡ธ San Diego 159 1997
22
Beam Globalbeamforall.com

Clean technology innovator specializing in sustainable infrastructure products, EV charging solutions, energy storage, and energy security to power transportation and protect the environment

Renewable Energy Equipment Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 97 2006
23
Space Micro โ€“ Powered by Voyager Spacespacemicro.com

An engineering-driven supplier of radiation-hardened communications, electro-optics, and digital systems for commercial, civil, and military space applications worldwide Based in San Diego, CA

Defense and Space Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 84 2002
24
Nikkiso America, Inc.nikkisoamerica.com

The company provides innovative technologies and products globally, focusing on aerospace, industrial, medical, and precision equipment divisions to meet customer demands

Industrial Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 65 2006
25
5th Axis Inc.fifthaxis.com

A world leader in automated production, manufacturing, and machining, providing turnkey solutions for product development, assembly, finishing, and logistics with expert mechanical engineering

Industrial Machinery Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 61 2004
26
Presidio Components, Inc.presidiocomponents.com

Designs and manufactures ceramic capacitors for demanding applications including space, military, high-temperature, RF, and custom commercial electronics.

Appliances, Electrical, and Electronics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 56 n/a
27
Hi-Tech Electronic Manufacturing Corporation (HiTEM)hitem.com

Provider of Contract Manufacturing and Electronic Manufacturing Services to OEMs in military, aerospace, telecommunications, medical, and industrial markets

Appliances, Electrical, and Electronics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 30 1997
28
USS Santa Fe (SSN 763)en.wikipedia.org

A submarine company based in San Diego, CA, with an improved Los Angeles-class submarine commissioned in 1994 and named after Santa Fe, New Mexico

Military and International Affairs ๐Ÿ‡บ๐Ÿ‡ธ San Diego 5 n/a

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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 2, 2026.

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