| # | Company | Employees |
|---|---|---|
| 1 | 4,088 | |
| 2 |
United Launch Alliance (ULA)ulalaunch.com
providing reliable, accurate rocket launch services with advanced technology, high performance, and affordability for diverse payload delivery. |
3,185 |
| 3 |
Ball Aerospacebaesystems.com
Expertise in spacecraft, instruments, ground systems, sensors, tactical systems, operations, and data analytics to support customer missions. |
2,061 |
| 4 |
Maxar Technologiesvantor.com
Provider of secure, precise geospatial insights using advanced satellite imagery and AI software to support global safety and disaster response. |
1,325 |
| 5 |
ClearanceJobsclearancejobs.com
Defense career network matching job seekers with active security clearances to registered employers and recruiters for Department of Defense and Energy positions. |
903 |
| 6 |
Voyager Technologiesvoyagertechnologies.com
Pioneering mission-critical solutions for civil and government missions while tackling complex challenges to fortify national security and protect assets from ground to space. |
650 |
| 7 |
ICR, Inc.icr-team.com
A pioneering company solving Intelligence and Defense engineering challenges through practical solutions, a culture of mentorship, and employee ownership |
611 |
| 8 |
Barber-Nicholsbarber-nichols.com
Specializing in engineering design and production of turbomachinery, the company offers custom products for aerospace, cryogenic, defense, and energy applications, as well as consulting and contract manufacturing |
572 |
| 9 |
SPARTAdomaineasy.com
A provider of technical products and services to US government sectors, specializing in critical analysis, computer science solutions, network architecture, and acquisition support |
543 |
| 10 |
Frontgrade Technologiesfrontgrade.com
Connects sensing to action across domains, providing expertise in RF systems, mission processing, and motion control for various applications. |
508 |
| 11 |
Ursa Majorursamajor.com
Designing and building high-performing American rocket propulsion and defense systems to support national security superiority across air, sea, and space domains. |
472 |
| 12 |
York Space Systemsyorkspacesystems.com
Aerospace company revolutionizing spacecraft affordability and reliability, offering complete mission solutions and spacecraft platform manufacturing for global space missions |
453 |
| 13 |
True Anomalytrueanomaly.space
Designs and builds spacecraft platforms, mission software, and payloads for space superiority, focusing on precision sensing and command and control for defense. |
382 |
| 14 |
Beehive Industriesbeehive-industries.com
American technology developer and manufacturer for defense and aerospace industries, focused on industry-defining innovations made in the USA Aimed at reindustrializing America |
366 |
| 15 |
Honeybee Robotics, a Blue Origin Companyblueorigin.com
Innovative robotics company within the Blue Origin family, specializing in developing technology for space exploration and utilization since 1983 |
335 |
| 16 |
Aleut Management Servicesaleutmgt.com
A family of companies offering professional consulting, computer maintenance, facilities support, technology services, and engineering to government and DoD markets |
170 |
| 17 |
USSF Combat Forces Commandspoc.spaceforce.mil
A Field Command of the US Space Force protecting America and allies in space, providing intelligence, cyber, and combat support forces |
155 |
| 18 |
ExoTerra Resource LLCexoterra.com
Develops electric propulsion systems, solar electric propulsion modules, and buses for miniaturized satellites, focusing on power and electric propulsion solutions. |
153 |
| 19 |
Orbit Faborbitfab.com
The company envisions a thriving in-space market by providing satellite propellant in Earth orbit for expanded operational potential and business model flexibility |
95 |
| 20 |
Radiation Test Solutions, Inc.radiationtestsolutions.com
Provides radiation effects expertise and testing solutions, helping companies design products that perform reliably in harsh radiation environments, offering support without the overhead of full-time staff. |
26 |
| 21 |
KSAT Inc.
Provides world-leading ground station communication and Earth observation services globally, supporting rapid delivery for new and legacy space satellite missions. |
26 |
| 22 |
CisLunar Industriescislunarindustries.com
Builds scalable, intelligent hardware transforming power to run space, enabling humanity to expand and sustainably settle the Solar System with a robust in-space economy. |
21 |
| 23 |
Lux Aeternaluxaeterna.com
Development of reusable satellite fleet providing reliable, flexible orbit access for defense, intelligence, commercial, and manufacturing customers. |
17 |
| 24 |
Visser Precisionvisserprecision.com
The company manufactures multi-dimensional solutions using Amorphous Casting, Additive Manufacturing, and Precision Machining as a Solutions Partner |
16 |
| 25 |
SPIRE Manufacturing Solutionsleidos.com
Specializing in precise machining and manufacturing of engineered products with a focus on innovative solutions and delivering high-quality customer service |
16 |
| 26 |
Canopy Technologiescanopy-ad.com
An industrial manufacturer specializing in critical ceramic materials and components for the US Space and Defense industry, utilizing advanced technologies for efficiency and performance enhancements |
13 |
| 27 |
Perkins Precision Developments, LLCperkinsprecision.com
Precision optical components manufacturer offering custom laser optics, coatings, and assemblies for various industries with a focus on quality, consistency, and customer service |
10 |
| 28 |
PraesiDMpraesidm.com
A leading provider of productivity-improving services and products for the NX CAM platform, focusing on automation to drive throughput and increase profitability |
8 |
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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 Oct 24, 2026.
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The same list elsewhere in United States
- Defense and Space Manufacturing companies in the United States 564
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