Senior .
NET Developer (Technical Lead) Melbourne (Laverton) | Contract Opportunity | Defence & Secure Technology Environment Our client is a leading global technology and consulting organisation delivering critical solutions across government and highly secure environments. They support large-scale technology programs that require robust engineering practices, operational excellence, and strict security compliance.

About the Role
We are seeking an experienced Senior .
NET Developer (Technical Lead) to lead application sustainment, enhancement, and support activities for a suite of mission-critical engineering applications operating within a highly secure environment. This role is ideal for a hands-on technical leader who enjoys solving complex technical issues, driving application improvements, and ensuring the ongoing reliability, security, and compliance of enterprise systems.

Key Responsibilities
- Lead Level 3 and Level 4 application support activities, including code-level troubleshooting and root cause analysis.
- Design and deliver major application enhancements within a structured Waterfall development methodology.
- Maintain application security accreditation and configuration in line with Information Security Manual (ISM) requirements.
- Coordinate end-to-end software releases, ensuring appropriate testing, approval, and deployment controls are followed.




- Manage high-priority incidents and provide timely resolution of critical production issues.
- Maintain and update technical documentation, including architecture and system design artefacts.
- Provide technical leadership and guidance across application lifecycle activities. Required Skills & Experience
- Strong expertise in .
NET Framework, .
NET Core, and C# development.
- Extensive experience supporting and developing enterprise applications in Microsoft technology environments.
- Robust knowledge of IIS and Windows Server-based web application hosting.
- Proven experience across the full Software Development Lifecycle (SDLC).
- Demonstrated experience working within structured Waterfall delivery frameworks.
- Excellent problem-solving, troubleshooting, and stakeholder engagement skills.
- Experience supporting business-critical systems in secure or regulated environments. Mandatory Requirements
- Active AGSVA NV1 Security Clearance is essential.
- Ability to work full-time onsite in Laverton, Melbourne.
- Australian Citizenship required due to the security-cleared nature of the environment. What's on Offer?
- Opportunity to work on mission-critical technology platforms.
- Engage in complex technical challenges within a highly secure environment.
- Join a collaborative team of experienced technology professionals.
- Long-term contract potential within a major transformation and sustainment program.

📌 .NET Technical Lead (Albany)
🏢 Whizdom
📍 Albany