C4 Network & Communications Architect - Routing & Bearers

Join our Downer Professional Services team and play a key role in delivering complex defence and national security projects that safeguard Australia's future.

Downer Professional Services comprises of three business units our Technical, Advisory, and Capability consulting practice, and Team Downer, which partners with CASG and NSSG as a major service provider to Defence. Together, we are a multi-disciplinary advisory and delivery partner of choice for clients across Defence and National Security.

We currently have an prospect for a Senior C4 Network & Communications Architect - Routing & Bearers based in Canberra. You will support foundational Joint Force Command, Control, Communications and Computers (C4) design activities, developing the architectures and technical guidance required to improve information exchange and interoperability across the Integrated Force and with coalition partners.

What You'll Do

This role offers a broad scope, with key role responsibilities include:

- Lead the review and development of foundational C4 design guidance covering network routing, transport, security, protocols, standards, SATCOM and military RF technologies.
- Apply systems engineering and mission engineering methodologies to develop logical, functional and physical C4 architectures for the Joint Force.
- Develop Systems of Systems architecture views, digital models and visualisations that describe current-state and future-state C4 environments.
- Collaborate with Defence Groups, Services, capability programs and standards specialists to develop force integration artefacts and formalised standards profiles.




- Prepare submissions and technical briefs for senior Defence forums, capability gate reviews, working groups and investment boards.

What You'll Bring

- Demonstrated expertise across the Open Systems Interconnection reference model, particularly the physical, data link, network and transport layers, supported by strong knowledge of WAN standards and protocols.
- Technical experience with SATCOM and radio frequency systems in a military or similarly complex operational environment.
- Experience developing ICT architecture views using frameworks and methods such as the Unified Architecture Framework, enterprise architecture and solution architecture.
- Experience in C4 Systems of Systems Engineering, systems engineering, mission engineering or Model-Based Systems Engineering.
- Strong stakeholder engagement, technical writing and collaboration skills, with the ability to translate complex operational and technical requirements into clear architecture and design guidance.

Experience in Defence capability development or sustainment activities, familiarity with Defence writing standards and experience supporting senior Defence governance forums will be highly regarded.

Due to the nature of the work, you are required to currently hold and maintain an AGSVA Security clearance as required by the Commonwealth. In some instances,



compliance with International Traffic in Arms Regulations (ITAR) requirements may also be an inherent requirement.

More than anything, you'll bring a strong work ethic, a positive attitude, and a commitment to delivering high-quality outcomes for our clients.

Why Downer Professional Services

At Downer Professional Services, we're not just a workplace - we're a business dedicated to contributing to the shaping of the future of defence in Australia. As the country's only sovereign prime, we're committed to making a real difference in protecting Australia's interests.

What is means to belong at Downer Professional Services

- Meaningful work: Help to deliver critical Defence projects that protect Australia and shape its future.
- Professional development: Access career mapping, accelerated learning programs, and shared learning through our Communities of Practice.
- Great perks: Enjoy discounts on healthcare, retail, vehicles, and more through Perks@Downer.
- Veteran support: Benefit from initiatives like up to 20 days of Reservist Leave to stay connected post-service.

You want your work to matter and so do we. With over 26,000 people across Australia, New Zealand and the Pacific, our team is made up of individuals with unique perspectives, backgrounds, and ideas.

We know that diversity makes us stronger and we actively celebrate it through our commitment to inclusion and belonging.

We're committed to building a team that reflects the diverse communities we serve and we welcome people of all ages, genders, sexual orientations, cultures, abilities, and lived experiences. We especially encourage applications from those whose voices have tr

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