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 opportunity for a Senior Technical Specialist – Systems Integration & Architecture in Canberra to work on Defence projects.   

What You’ll Do  
  

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

• Lead Defence integration architecture activities, overseeing solutions across strategic, operational, and deployed networks while ensuring alignment with DIE standards and secure operating frameworks 

• Provide authoritative SME guidance on legacy and operational Defence systems, supporting incident management, interoperability, and continuity across tactical, strategic, and coalition environments. 

• Represent Australia in coalition forums, including PEGASUS CWAN planning teams, ensuring national requirements are reflected in multinational network design and enhancement decisions. 

• Drive transition and capability uplift, providing technical leadership for migrations, new service integration, interoperability assurance, and compliance with DSC Design Standards. 

• Develop, review, and maintain DSC Design Standards, ensuring they clearly guide ICT delivery organisations and align with security, facility, interoperability, and operational requirements while engaging senior Defence and international stakeholders. 

 
What You’ll Bring 
 

• Demonstrated expertise at SFIA SINT Level 5, with proven leadership delivering integration architecture across classified Defence environments and lifecycle gates. 

• Extensive knowledge of Defence networks, including strategic, deployed, legacy, and coalition systems, supported by experience in military communications planning and sustainment 

• Strong technical leadership across complex programs, including representation in multinational or coalition technical forums and influencing diverse Defence stakeholders. 

• Deep understanding of Defence capability lifecycle, governance, ITIL service management, and hands‑on experience with systems such as SATCOM, tactical radios, radar integration, DWAN, DTCN, and PEGASUS. 

• Competence across SFIA SINT Level 5 domains, including integration architecture, complex problem resolution, governance and assurance, stakeholder influence, and operational awareness of military communications. 

Due to the nature of the work, you are required to currently hold and maintain a minimum Negative Vetting 2 or higher 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 traditionally been underrepresented in our industry, including women, Aboriginal and Torres Strait Islander Peoples, Māori and Pasifika Peoples, veterans, people with disability, and neurodivergent individuals.  Even if your experience doesn’t align perfectly with this role, we’d still like to hear from you. If it feels like the right fit, apply - potential counts, and so do you.