AWS System Engineer

Service Stream Fixed Communications; Melbourne; On-site; AUD 110,000 - 150,000; Full time

Benefits offered by this job

Career development

Discounts

Paid leave

Job summary

Service Stream Fixed Communications is seeking an experienced AWS Systems Engineer in Melbourne to administer AWS, Windows, Linux, and Microsoft 365 environments. You will drive automation, security uplift, and operational excellence across a national technology landscape.

You will report to the Head of Enterprise Technology and work in a hands-on role focused on monitoring, patching, hardening, and resilience to support critical infrastructure and Defence-related work.

Qualifications

• 3+ years' experience in systems administration or infrastructure engineering.
• Strong AWS administration experience across core cloud services.
• Hands-on experience supporting Windows Server and Linux environments.
• Microsoft 365 administration experience, including Entra ID, Exchange Online, Teams, SharePoint and Intune.
• Experience managing patching, vulnerability remediation and security controls.
• Knowledge of enterprise networking technologies including DNS, VPNs and firewalls.
• Scripting and automation experience using PowerShell and/or Python.
• Strong troubleshooting, analytical and problem-solving skills.

Responsibilities

• Administer and optimise AWS environments and cloud networking.
• Support Azure services and hybrid cloud environments.
• Manage Windows Server and Linux environments, AD, DNS, and DHCP.
• Administer Microsoft 365 services including Entra ID and Exchange Online.
• Drive security improvements, vulnerability remediation, and patching.
• Support network technologies, firewalls, DNS, VPNs and load balancing.
• Develop automation via PowerShell and Python; pursue IaC and standardisation.
• Maintain monitoring, backup, and disaster recovery processes.

Skills

AWS administration

PowerShell scripting

Python scripting

Windows/Linux administration

Troubleshooting

Automation mindset

Stakeholder engagement

Education

Degree in IT/CS/Engineering

AWS Solutions Architect Associate or SysOps

Azure Administrator AZ-104/AZ-500

Microsoft 365 certifications (MS-102/MD-102)

ITIL Foundation

Tools

Active Directory

DNS/DHCP

Intune

Exchange Online

Job description

Primary Location

VIC - Melbourne - 655 Collins St

Job Description Summary

At Service Stream, we deliver and operate critical infrastructure across telecommunications, utilities, transport, defence and social infrastructure sectors. As we continue to enhance our technology landscape, we're looking for an experienced AWS Systems Engineer to support and optimise our cloud, infrastructure and Microsoft 365 environments.

Reporting to the Head of Enterprise Technology, this is a hands‑on role focused on operational excellence, security uplift and continuous improvement across a national technology environment.

About the Role

Location : Collins Street, Melbourne.

Work type : Full time permanent.

Working requirements: As this role supports our Defence contract, you must be an Australian Citizen and able to obtain and maintain a Defence Security Clearance.

About the Role

As our AWS Systems Engineer, you will be responsible for the day‑to‑day administration and optimisation of AWS, Microsoft 365, Windows and Linux environments. You'll play a key role in ensuring our platforms remain secure, patched, resilient and highly available while driving automation and operational efficiencies.

This is a genuine run‑and‑improve position, ideal for someone who enjoys owning operational outcomes, solving complex technical issues, and continuously improving systems and processes.

Cloud Administration

• Administer and optimise AWS environments, including EC2, VPC, IAM, S3 and cloud networking.
• Support Azure services and hybrid cloud environments.
• Monitor performance, utilisation and cloud costs to ensure efficient operations.

Infrastructure & Systems Management

• Manage and support Windows Server and Linux environments.
• Maintain Active Directory, Group Policy, DNS and DHCP services.
• Perform system patching, hardening, upgrades and lifecycle management.

Microsoft 365 Administration

• Manage and support Microsoft 365 services including: Entra ID, Exchange Online, Teams, SharePoint Online, Intune
• Administer user access, devices, licensing and identity services.

Security & Vulnerability Management

• Drive security improvement initiatives and platform hardening.
• Manage vulnerability remediation programs and patch compliance.
• Support Essential Eight maturity initiatives and security uplift activities.
• Manage SSL/TLS certificate lifecycles and renewals.

Networking & Vendor Management

• Support enterprise networking technologies including firewalls, DNS, VPN and load balancing.
• Manage network equipment lifecycle activities and firmware updates.
• Build and maintain strong relationships with vendors and service providers.

Automation & Continuous Improvement

• Develop automation solutions using PowerShell and Python.
• Identify opportunities to reduce manual effort and improve operational efficiency.
• Contribute to infrastructure‑as‑code and platform standardisation initiatives.

Monitoring, Backup & Recovery

• Maintain monitoring and alerting across infrastructure and cloud platforms.
• Participate in incident response and root cause investigations.
• Manage backup, recovery and resilience processes to support business continuity.

What You’ll Bring

• 3+ years' experience in systems administration or infrastructure engineering.
• Strong AWS administration experience across core cloud services.
• Hands‑on experience supporting Windows Server and Linux environments.
• Microsoft 365 administration experience, including Entra ID, Exchange Online, Teams, SharePoint and Intune.
• Experience managing patching, vulnerability remediation and security controls.
• Knowledge of enterprise networking technologies including DNS, VPNs and firewalls.
• Scripting and automation experience using PowerShell and/or Python.
• Strong troubleshooting, analytical and problem‑solving skills.
• Excellent stakeholder engagement and communication skills.
• A proactive mindset with a passion for continuous improvement.

Desired Qualifications

• Degree in Information Technology, Computer Science, Engineering or a related discipline.
• AWS Solutions Architect Associate or AWS SysOps Administrator certification.
• Azure Administrator (AZ-104) or Azure Security (AZ-500) certification.
• Microsoft 365 certifications such as MS-102 or MD-102.
• Cisco CCNA or equivalent networking certification.
• ITIL Foundation certification.
• Security-focused certifications such as CompTIA Security+ or Microsoft SC-200 are highly regarded.

About Us

Service Stream is an equal opportunity ASX-listed organisation that develops and operates Australia's essential service networks across telecommunications, utilities, transport, defence and social infrastructure. Our work supports and connects communities across the nation.

Benefits of working with us

• Growth - Career development and internal mobility opportunities across our diverse business.
• Discounts - Access to hundreds of retail and service discounts including Woolworths, JB Hi-Fi, Airbnb and Bupa.
• Paid leave - Parental, cultural, community service, study, corporate volunteering and purch