Windows Infrastructure Engineer (AWS)

Job Description

\n

Windows/AWS - Systems Engineer and Site reliability Engineer

About the Company \n

Our client is a high-performing organisation operating within the financial services industry, delivering advanced technology solutions across cloud, infrastructure, and enterprise Windows platforms. Having migrated from an on-premises environment to AWS, they now run a significant Windows server estate in the cloud and are investing heavily in modernising their Windows and cloud platform capabilities to support complex, customer-facing systems.

About the Role \n

This is a hands-on Windows Systems Engineer / Windows Systems Administrator role with strong AWS skills, combining two key areas in roughly equal measure:

\n

\n
• ~50% Windows engineering and AWS infrastructure
\n
• ~50% traditional Windows systems administration and corporate IT support
\n

\n

You will be building robust automation, managing directory services, and standardising configuration-as-code while also supporting day-to-day corporate IT needs. You'll partner closely with software engineering, database administration, and security teams to embed modern cloud infrastructure practices.

\n

Windows capability is the primary requirement for this role - candidates need strong, all-round Windows engineering expertise, ideally paired with AWS or broader cloud/SRE experience as a point of differentiation.

Location & Working Arrangement \n

\n
• Based in North Sydney, 3 days per week in the office, 2 days from home
\n
• Participation in an on-call roster is mandatory (approximately one week on, every 3-4 weeks, with potential to reduce as the environment and automation mature)
\n

Key Responsibilities \n

\n
• Day-to-day administration of Windows servers running in AWS
\n
• Investigate and resolve performance issues across Windows and cloud infrastructure
\n
• Build, and operate Windows-based AWS cloud services, including enterprise workloads, Active Directory replication, storage (FSx/S3), and database layers
\n
• Take hands-on ownership of service delivery from implementation through to production deployment and ongoing operations
\n
• Administer AWS Systems Manager (SSM), AWS policies, and role-based access control
\n
• S3 administration
\n
• Create scalable systems through automation and platform uplifts, identifying opportunities to reduce manual effort via PowerShell and AWS SSM
\n
• Control configuration drift and manage automated patching across the Windows fleet
\n
• Ensure comprehensive observability and alerting across Windows and underlying cloud systems; provision live system metrics, SLO, alerting, and operational reporting dashboards
\n
• Provide traditional Windows systems administration and support to corporate IT / desktop support teams
\n
• VPN administration and troubleshooting (Netskope)
\n
• Microsoft OneDrive / Microsoft 365 administration
\n
• Provide emergency response and technical leadership during system outages or incidents; conduct post-mortems, root cause analysis, and problem rectification
\n
• Champion AI-assisted, spec-driven automation practices, using tools such as Claude Code or similar LLM-based coding assistants
\n
• Potentially contribute to broader automation initiatives, including CI/CD
\n
• Develop and maintain runbooks, infrastructure diagrams, and OS baseline standard documentation
\n

Skills & Experience \n

Critical:

\n

\n
• Strong Windows administration / engineering skills - Active Directory Domain Services, Group Policy, DNS, DHCP, ADCS, IIS, failover clustering, patching, and hardening
\n
• Commercial AWS experience, including Windows workloads on EC2 with Systems Manager, backup, and DR
\n
• SCCM / Configuration Manager experience - site and distribution point administration, OS deployment and imaging, application packaging, patch compliance, configuration baselines, collections, and reporting; complementary tooling such as WSUS, MDT, or Group Policy deployment also expected
\n
• Strong troubleshooting capability across both infrastructure and corporate IT environments
\n
• Strong PowerShell scripting and automation capability across Windows Server and AWS estates
\n
• SRE practices, including defining and managing SLOs and error budgets
\n

Nice-to-have: \n

\n
• Netskope
\n
• Observability tooling - Grafana (the team is moving towards Grafana for observability), Datadog, Dynatrace, Prometheus, Loki, Tempo
\n

Ideal Candidate Profile \n

An all-round Windows engineer who has developed strong AWS/cloud capabilities - potentially someone who has moved from a Windows/Systems Engineering background into cloud or SRE work. The ideal candidate combines both skill sets rather than being purely an SRE/cloud engineer and should be at least comparable to a strong internal Windows candidate in Windows expertise, with additional strength in AWS or another relevant area providing differentiation.

Certifications \n

\n
• Microsoft Certified: Windows Server Hybrid Administrator Associate, or MCSA/MCSE: Windows Server equivalent - very highly regarded
\n
• AWS Certified SysOps Administrator - Associate or Solutions Architect - Associate - very highly regarded; AWS Specialty certifications (Security, Advanced Networking) highly regarded
\n
• Terraform Associate or Professional certification well regarded
\n
• Microsoft 365 (MS-102) and Juniper (JNCIA-SEC or above) certifications desirable
\n

\n

#J-18808-Ljbffr