Sr System Engineer (Wintel)

Unisys; Canberra; On-site; AUD 120,000 - 180,000; Full time

Job summary

Unisys in Canberra is seeking an experienced Windows/Identity and Cloud Infrastructure Specialist to support enterprise identity, PKI, and cloud services across on-premises and cloud environments. The role focuses on ensuring system availability, security, and compliance through incident management, automation, and documentation.

You will manage Windows Server, Active Directory, Entra ID/Entra Connect, Keyfactor Command, AVD, Nerdio, and AWS integrations, delivering proactive improvements and

Qualifications

• Experience administering Windows Server environments, applying patches and hardening.
• Strong PKI and certificate lifecycle management, including working with KeyFactor Command.
• Hands-on Active Directory and Domain Controller administration.
• Experience with Entra Connect and Entra ID configuration and troubleshooting.
• Familiarity with Azure Virtual Desktop and Nerdio for desktop virtualization.
• Scripting ability for automation and operational tasks.
• Solid incident management and root-cause analysis skills.
• Good communication and collaboration across cross-functional teams.
• NV1 security clearance required.

Responsibilities

• Operate and maintain Windows Server environments - 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

Skills

Windows Server administration

PKI & certificate management

Active Directory

Entra Connect / Entra ID

Azure Virtual Desktop (AVD) / Nerdio

Automation scripting

Incident management

Cross-functional collaboration

Tools

KeyFactor Command

Azure/AWS tooling

Job description

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.