The aerospace and defence sector in Australia includes large government defence bodies, as well as established private companies and younger firms. Defence Australia, with over 14,000 employees, is focused on national security through international partnerships. BAE Systems Australia develops defence technologies, while ASC Pty Ltd specializes in submarine construction and maintenance. Austal is a global shipbuilder, and Codan Limited provides rugged electronics and engineering.
The companies span a range of activities from direct defence operations and shipbuilding to specialized electronics and engineering services. A notable pattern is the concentration of headquarters in Adelaide, which hosts BAE Systems Australia, Defence Science and Technology Group, Babcock Australia & New Zealand, and Nova Systems.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Defence Australiadefence.gov.au
Protects national interests through international partnerships and local industry investment to develop innovative capabilities for security and protection of all citizens. |
14,134 | |||
| 2 |
BAE Systems Australiabaesystems.com
Develops cutting-edge technologies to protect Australia through diverse engineering and global teamwork, providing large-scale defense solutions and career opportunities in a growing sector. |
3,725 | |||
| 3 |
ASC Pty Ltdasc.com.au
An Australian company specializing in building and maintaining submarines for the Royal Australian Navy, as well as providing training for submariners |
2,874 | |||
| 4 |
Austalaustal.com
A global shipbuilder that designs, constructs, and sustains advanced commercial and defence vessels, with a focus on aluminium shipbuilding and international projects |
1,937 | |||
| 5 |
Defence Science and Technology Group (DSTG)dst.defence.gov.au
A national agency applying science and technology to protect Australia, providing advice, innovative solutions, and technical support for defense and national security |
1,237 | |||
| 6 |
Babcock Australia & New Zealandbabcock.com.au
Providing defence and civil markets with maritime sustainment, secure communications, helicopter missions, and fleet management across Australasia. |
1,197 | |||
| 7 |
Leidos Australialeidos.com
Delivering complex technology solutions across defence, intelligence, aviation, and health markets through systems integration, maritime autonomy, airborne surveillance, and government ICT modernisation services. |
1,141 | |||
| 8 |
ADF Careersadfcareers.gov.au
Offering 250+ career opportunities in Navy, Army, and Air Force across various fields with paid training, competitive salaries, and benefits |
1,124 | |||
| 9 |
Codan Limitedcodan.com.au
A global group of electronics and engineering businesses specializing in rugged and reliable hardware, software, and embedded systems for various industries worldwide |
1,006 | |||
| 10 |
Raytheon Australiaraytheonaustralia.com.au
Delivering innovative, reliable defence solutions and whole-of-life capabilities to support Australian Defence Force missions and national security. |
863 | |||
| 11 |
Saab Australiasaab.com
A prime systems integrator specializing in delivering complex defence and civil security projects, committed to collaboration, innovation, and meeting customer needs |
816 | |||
| 12 |
Nova Systemsnovasystems.com
Design, integration, and delivery of complex programs for Defence, emergency services, and civil applications with deep operational understanding. |
695 | |||
| 13 |
AIM Defenceaimdefence.com
Specializing in ultra-compact high-power laser systems with advanced AI tracking, the company focuses on developing directed energy and AI systems for defense purposes |
682 | |||
| 14 |
Hofmann Engineering Pty Ltdhofmannengineering.com
Provider of specialist engineered parts and services for mining, defence, transport, and energy industries worldwide Focus on research, development, and manufacturing across multiple countries |
484 | |||
| 15 |
Bhagwan Marinebhagwanmarine.com
A leading marine solutions provider offering offshore, inshore, and subsea services, engineering, civil construction support, and project management across various industries |
468 | |||
| 16 |
DroneShielddroneshield.com
Develops specialized security solutions protecting people and critical infrastructure from unauthorized drone threats using engineering expertise across defense, intelligence, and aerospace sectors. |
452 | |||
| 17 |
Downer Professional Servicesdownerprofessionalservices.com.au
A multi-disciplinary advisory and delivery partner for defense, government, and infrastructure projects in Australia, focused on building sovereign capability |
441 | |||
| 18 |
QinetiQ Australiaqinetiq.com
An integrated global defense and security organization delivering innovative technologies and capabilities through testing, engineering, and advisory services in Australia |
432 | |||
| 19 |
Synergy Groupsynergygroup.net.au
A pragmatic consulting firm that collaborates with clients to deliver success through transformation, creative solutions, and lasting partnerships in Australia |
402 | |||
| 20 |
Hanwha Defence Australiahanwha-defence.com.au
Manufacturer of self-propelled artillery and infantry fighting vehicles in Australia, with a focus on establishing a manufacturing facility to support domestic and global operations |
386 | |||
| 21 |
Boeing Aerostructures Australiaboeing.com.au
Specializes in designing and manufacturing advanced composite aerostructure components for commercial aircraft, with a long heritage in Australian aviation |
379 | |||
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| 22 |
Northrop Grumman Australianorthropgrumman.com
A leading provider of autonomous, C4ISR, cyber, logistics and strike systems in Australia, focused on innovation, job creation, and technology leadership |
356 | |||
| 23 |
TAE Aerospacetaeaerospace.com
Global aerospace company offering innovative design, engineering, maintenance, manufacturing, and repair solutions for military engines, APUs, avionics, and aircraft components |
335 | |||
| 24 |
RJE Global Pty Ltdrjeglobal.com
Engineering, project management, and construction services for mining, resources, infrastructure, power generation, and distribution sectors with focus on quality and in-house capabilities |
327 | |||
| 25 |
Birdon Groupbirdongroup.com
A diversified global group providing whole of life solutions to maritime, military, infrastructure, and resource sectors, operating nationally and internationally |
309 | |||
| 26 |
PWR Advanced Cooling Technologypwr.com.au
Global leader in high performance thermal management for racing teams and various industries Specializes in aluminium brazing, machining, design, and product validation Engineering excellence with a focus on teamwork |
284 | |||
| 27 |
Electro Optic Systemseos-aus.com
An Australian technology firm specializing in defense, space, and communications products Offers advanced optical, laser, and satellite solutions globally |
254 | |||
| 28 |
Jacobs Australia Pty Ltdjacobs.com
A subsidiary of a global engineering group, specializing in providing technical services to Defence sectors with a focus on innovation and opportunity for skilled professionals |
233 | |||
| 29 |
Q-CTRLq-ctrl.com
Specializing in quantum technology, we provide infrastructure software to address hardware error and instability, enabling its practical application in various sectors |
205 | |||
| 30 |
Northrop Grumman Australianorthropgrumman.com
A leading global security company providing innovative solutions in autonomous systems, cyber, C4ISR, strike, logistics, and modernisation to customers worldwide |
202 | |||
| 31 |
Advanced Navigationadvancednavigation.com
Advanced Navigation is a leader in AI robotics and navigation technologies, offering solutions for land, air, sea, and space applications with exceptional performance and precision |
193 | |||
| 32 |
NIOAnioa.com.au
Global munitions supplier specializing in firearms, weapons, and munitions Serving defense forces, law enforcement, sporting markets, with strategic locations worldwide |
138 | |||
| 33 |
PentenAmio AUpentenamio.com
Provides advanced digital security solutions for national security and resilience. Focuses on complex digital challenges, secure mobility, and AI-driven deception technologies for government and defense markets. |
123 | |||
| 34 |
HEOheospace.com
A space technology company specializing in non-Earth imaging, analytics for spacecraft, advancing understanding of space objects, promoting transparency and sustainability in space activities |
117 | |||
| 35 |
Mackay Australia Pty Ltdderwentindustries.com.au
Supplier of engineered rubber and metal/rubber composite products for Automotive, Defence, Industrial, and Rail markets Focused on providing cost-effective solutions globally |
44 | |||
| 36 |
W&E PLATT PTY LTDplattmounts.com
Specializing in weapon mount design, manufacture, installation, and logistics support for military vehicles and naval vessels worldwide for over 40 years |
34 | |||
| 37 |
LC60 AI - LatConnect 60lc60.ai
Australian AI company generating vital insights for agriculture, carbon, and resources monitoring using satellite data, proprietary AI, and its own LEO constellation. |
30 | |||
| 38 |
Luminact Pty Ltdluminact.com.au
A small Australian-owned company providing engineering, project management, and commercial services to the Defence and industry sectors, with a focus on innovation and integration |
27 | |||
| 39 |
Swiss Helicopter Maintenance AGshm-ag.ch
Provides helicopter maintenance, continuing airworthiness management, and is an authorized service center for Airbus, Leonardo, and Guimbal helicopters. |
25 | |||
| 40 |
Equans Axima Australia - T/A Noske-Kaeser Marinemarine.equans.com
A global leader in marine and offshore solutions, providing innovative technology in air conditioning, fire protection, and more tailored to clients' needs |
22 | |||
| 41 |
Neumann Spaceneumannspace.com
Develops efficient, scalable in-space electric propulsion systems for satellites, converting solid propellants into plasma for thrust in various low Earth orbit missions. |
21 | |||
| 42 |
Geospatial Intelligencegeoint.global
An Australian company specializing in geospatial intelligence for environmental management, natural resources, defense, and security through the intelligent use of spatial data |
18 | |||
| 43 |
Arlulaarlula.com
Provides infrastructure and single access point for procuring, managing, and processing satellite imagery at scale, connecting Earth observation data to people and businesses. |
12 | |||
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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.
More company lists in Australia
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- Critical infrastructure operators in Australia 450
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