Senior Application Systems Engineer (EL1 Equivalent)

---

About the Role

Services Australia is seeking an experienced Senior Application Systems Engineer to support, administer, and enhance a range of commercial-off-the-shelf (COTS) and bespoke ICT solutions. The role supports business‑critical digital services and applications built primarily on the Microsoft .NET technology stack, operating within a complex, highly regulated government environment.

The successful candidate will play a key role in ensuring the stability, security, availability, and performance of applications across web, desktop, web services, and batch processing platforms.

---

​

Key Responsibilities

The Senior Application Systems Engineer will be responsible for some or all of the following duties:

Application Support & Administration

• Provide ongoing technical support and administration for corporate web and desktop applications
  
• Support .NET‑based applications, including IIS-hosted services, Windows services, web services/APIs, and scheduled batch jobs
  
• Maintain and administer application environments across development, test, and production
  

Incident & Problem Management

• Diagnose and resolve complex system and application issues
  
• Participate in incident response, investigation, and root cause analysis
  
• Contribute to the resolution of problems to improve system stability and reliability
  

Patching, Maintenance & Enhancements

• Plan, test, and execute application and infrastructure patching activities
  
• Ensure systems comply with security, risk, and regulatory requirements
  
• Support the delivery of minor system enhancements and operational improvements
  

Infrastructure & Environment Management

• Work collaboratively with infrastructure, networking, and security teams
  
• Support physical, virtualised, and hybrid infrastructure environments underpinning application services
  
• Assist with lifecycle activities, including upgrades and retirement of legacy components
  

Documentation & Operational Readiness

• Develop, maintain, and review:
  • Technical documentation
    
  • Standard Operating Procedures (SOPs)
    
  • Support and operational runbooks
    
• Ensure documentation supports audit, compliance, and knowledge transfer requirements
  

---

Required Skills and Experience

• Extensive experience supporting enterprise applications built on the Microsoft .NET technology stack
  
• Strong experience in:
  • Windows Server environments
    
  • IIS application hosting
    
  • Web services and batch processing
    
• Demonstrated experience in incident, problem, and change management
  
• Proven ability to operate in high‑availability, security‑conscious environments
  
• Strong analytical and troubleshooting skills
  
• Excellent written and verbal communication skills
  

---

Desirable Experience

• Experience within Australian Government or other large, regulated environments
  
• Familiarity with government security policies and compliance frameworks