Active Directory Engineer

About Leidos Australia At Leidos Australia, our work goes beyond a job title. We design, build, operate and support the systems, services and capabilities that help protect and advance the Australian way of life. Backed by a global organisation of more than 40,000 people, our Australian team of around 2,000 has partnered with government, defence and national security customers for more than 30 years. We deliver mission-critical solutions where reliability, trust and purpose matter. Leidos is a destination for people who want their work to have purpose, their contribution to be recognised, and their career to grow without needing to fit a single mould. Meaningful work is supported by benefits, flexibility and career pathways that help you grow while balancing life outside work. This includes: Flex Your Way – Tailor work to your life with options including Life Days (up to 12 extra days off per year), part-time arrangements, job sharing, and compressed hours. Wellbeing That Matters – Free access to Headspace and MeQuilibrium, plus dedicated wellness spaces to support your mental, physical, and emotional wellbeing. Learn Without Limits – Access over 120,000 on-demand courses, alongside technical, project management, leadership, and professional development opportunities. Work That Makes an Impact – Contribute to nationally significant projects that matter, solve complex challenges, and accelerate your career through unique growth opportunities. Build Your Future – Whether you're deepening technical expertise or preparing for leadership, we'll invest in your development every step of the way. And Much More – These are just a few of the ways we invest in our people and help them thrive. About the Team You’ll join a team where people work with integrity, inclusion, innovation, agility, collaboration and commitment. In practice, that means sharing ownership, solving complex problems together and staying connected to the customer context, the purpose behind the work and how each role contributes to meaningful outcomes. We deliver secure, resilient and innovative technology services that enable Defence enterprise and warfighting capabilities across multiple classified domains and networks. We provide world-class ICT operations and agile digital modernisation using advanced analytics, automation, hybrid cloud, DevSecOps, Infrastructure as Code, cybersecurity and AI to optimise highly complex, mission-critical environments. The Opportunity We are seeking an experienced Active Directory Engineer to support the implementation, administration, security, and ongoing optimisation of enterprise identity and directory services. This role plays a critical part in protecting enterprise identity platforms, enabling secure access, maintaining service resilience, and reducing operational and security risk across the organisation. Working closely with infrastructure, cloud, cybersecurity, application, and service management teams, you will provide technical expertise across Active Directory, Group Policy, DNS, authentication, access controls, certificate services, and hybrid identity to deliver secure, reliable, and highly available identity services. Key Responsibilities Administer, secure, and maintain enterprise Active Directory environments, including domains, forests, trusts, replication, domain controllers, Group Policy, DNS, DHCP, and authentication services. Support hybrid identity services, including Microsoft Entra ID integration, synchronisation technologies, cloud identity initiatives, and authentication solutions. Monitor platform health, performance, security, backup, disaster recovery, and operational resilience of Active Directory and related services. Develop and maintain PowerShell automation, technical documentation, operational procedures, and engineering standards to improve efficiency and consistency. Partner with cybersecurity, cloud, infrastructure, and application teams to identify and remediate identity risks, support incident investigations, and contribute to modernisation initiatives. About You We are looking for someone who brings judgement, curiosity and a collaborative approach to work that matters. Skills & Experience Strong experience administering enterprise Active Directory environments, including AD DS, Group Policy, DNS, DHCP, Windows authentication, domains, forests, trusts, replication, and domain controllers. Demonstrated PowerShell scripting and automation capability, with experience supporting operational efficiency and identity-management processes. Practical experience with Microsoft Entra ID, hybrid identity integration, Active Directory Certificate Services, and Windows Server platforms. Strong understanding of identity security, privileged access management, disaster recovery, operational resilience, and Microsoft security best practices. Excellent troubleshooting, analytical, stakeholder engagement, and communication skills, with the ability to lead complex investigations and collaborate across technical teams. This role requires the successful applicant to be an Australian citizen and hold, or be eligible to obtain, NV-1 security clearance. If this role interests you, we encourage you to apply. We value different experiences and are interested in the capability and potential you could bring. What to Expect When You Apply Our hiring process is designed to be straightforward, respectful and easy to navigate. If your skills, experience and qualifications look aligned with the role, our Talent Acquisition team will contact you to discuss the next stage. You can expect: An initial conversation with our Talent Acquisition team An interview with the hiring manager or interview panel We’ll let you know what to expect before each stage, including who you’ll meet and how to prepare. If you need any adjustments or support during the process, please let us know. Ready to explore what’s possible? If this sounds like a role where you can make an impact and continue to grow, we’d like to hear from you. Please apply via the “Apply Now” button with your resume. If you have any questions about the role or recruitment process, please contact . If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.