Support and maintain enterprise identity, PKI, and cloud infrastructure services across on-premises and cloud environments. Responsible for the administration of Windows Server, Active Directory, Microsoft Entra ID, Entra Connect, and Keyfactor Command, while supporting Azure Virtual Desktop (AVD), Nerdio, and AWS-integrated solutions. The role focuses on ensuring system availability, security, and compliance through incident management, certificate lifecycle administration, automation, monitoring, troubleshooting, and continuous service improvement.
Key responsibilities
- Operate and maintain Windows Server environments - including patching, hardening, and troubleshooting
- Manage PKI and certificate lifecycle - design, issue, renew, and revoke certificates; administer KeyFactor Command
- Administer Active Directory and Domain Controllers - including GPOs, replication, and AD health
- Support cloud identity and connectivity - Entra Connect, Entra ID, and integration with on-prem systems
- Manage AWS Connect - integrations and related cloud services
- Deploy and support Azure Virtual Desktop - environments and user profiles
- Administer Nerdio - or AVD provisioning and management
- Participate in incident response, root cause analysis, and postmortems
- Automate operational tasks using scripting where appropriate
- Document runbooks, run regular health checks, and provide knowledge transfer
About you
- Proven experience with Windows Server administration
- Strong knowledge of PKI and certificate management - experience with KeyFactor Command preferred
- Hands-on Active Directory and Domain Controller experience
- Experience with Entra Connect and Entra ID - configuration and troubleshooting
- Familiarity with Azure AVD and Nerdio - for desktop virtualization
- Experience integrating on-prem identity with cloud services
- Scripting skills - for automation and operational tasks
- Solid troubleshooting and incident management skills
- Good communication skills and ability to work within cross-functional teams
- NV1 security clearance must have for this role
Nice to have
- VMware - administration experience.
- CyberArk Machine Identity or other machine identity management experience.
- Experience with AWS services.
- Certifications such as Microsoft Certified - Azure Administrator, Microsoft Certified: Identity and Access Administrator, or relevant security certifications.
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Sr System Engineer (Wintel) in Sydney employer: Unisys
Unisys is an exceptional employer, offering a dynamic work environment where technology meets aviation. As an Airport Mobility & Application Support Analyst, you'll not only gain hands-on experience with cutting-edge systems but also enjoy a culture that prioritises employee growth and collaboration. With opportunities to develop specialist expertise in airport technology and a commitment to diversity and inclusion, Unisys provides a rewarding career path in a unique and fast-paced industry.
