Cybersecurity & Systems Engineer

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 is comprised of two business units, our Technical, Advisory, and Capability consulting practice and Team Downer, a major service partner to Defence. Together, we are a multi-disciplinary advisory and delivery partner of choice for our clients in Defence and National Security.

We currently have an opportunity for a Cybersecurity & Systems Engineer in Melbourne to work on Land projects
.

What You'll Do

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

• Conduct penetration testing and vulnerability assessments across applications, networks, and infrastructure to identify and mitigate security risks.
• Perform security risk assessments and maintain accreditation compliance with frameworks such as ISM, Essential Eight, DISP, ISO 27001, and NIST standards.
• Prepare detailed technical reports and executive summaries communicating security findings, risks, and recommended mitigation strategies.
• Contribute to system design, integration, and verification activities, ensuring security controls are embedded throughout the system development lifecycle (SDLC).
• Administer and maintain operating systems and virtualization environments, supporting patch management, user account management, backup/recovery, performance monitoring, and troubleshooting complex system issues.

What You'll Bring

• Proven experience in penetration testing, vulnerability management, and security risk assessment within complex environments.
• Strong systems engineering and administration background, with hands-on expertise in Windows and Linux administration, including security hardening and patch management.
• Familiarity with government and defence system accreditation processes, along with networking, virtualization, and cloud platform experience.
• Ability to produce high-quality technical and executive-level reports that communicate complex security findings effectively.
• Relevant industry certifications (e.g., OSCP, CISSP, CEH) and/or systems engineering qualifications (e.g., INCOSE CSEP, ITIL), complemented by scripting/automation skills and knowledge of DevSecOps practices.

Due to the nature of the work, you are required to currently hold and maintain a minimum
Negative Vetting 1
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 .
• 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.

As a WORK180 Endorsed Employer, we support flexibility that works for your life, inclusive leadership that values your voice, and equitable access to opportunity so you can do your best work and bring your whole self to it.

If you need support or adjustments through the recruitment process, just let us know, we're here to help you put your best foot forward.