Security Sustainment & Support SME

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 are seeking an experienced Security - Sustainment & Support SME to support the LAND 4140 Battle Management System program. Working within a complex Defence environment, you will provide specialist security advice across sustainment and support activities, ensuring ongoing compliance, certification and operational effectiveness of the capability. What You'll Do This role offers a broad scope, with key role responsibilities including: Lead security assurance activities across sustainment and support elements of the LAND 4140 BMS capabilityVerify system security requirements and provide technical assurance for certification and accreditation activitiesReview, develop and maintain system security documentation, including certification artefactsConduct threat modelling, vulnerability assessments and security risk assessmentsContribute to system security architecture and integration activitiesEnsure compliance with Defence security frameworks including ISM, PSPF and DSPFSupport Cyber Supply Chain Risk Management (CSCRM) activitiesAnalyse functional and non‑functional performance specifications and update relevant documentationReview and manage security requirements using DOORS and associated artefactsWork closely with the Security Manager, Project Managers and Defence stakeholders to deliver secure outcomes What You'll Bring Extensive experience in security and/or cyber security roles within complex environments (8+ years)Strong understanding of Defence security frameworks, including ISM, PSPF and DSPFDemonstrated experience supporting system certification and accreditation activitiesProven ability to analyse, assess and manage cyber and system security risksStrong stakeholder engagement skills with the ability to influence technical and non‑technical audiencesExcellent written and verbal communication skills, including technical documentationPostgraduate qualifications in Cyber Security, ICT Management or a related discipline (or equivalent experience) 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. 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.