Job Description

Senior .NET Developer (Technical Lead) n
Melbourne (Laverton) | Contract Opportunity | Defence & Secure Technology Environment n
About the Organisation n
nOur 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.n
About the Role n
nWe 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.n
nThis 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.n
Key Responsibilities n
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- Lead Level 3 and Level 4 application support activities, including code-level troubleshooting and root cause analysis.
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- Design and deliver major application enhancements within a structured Waterfall development methodology.
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- Maintain application security accreditation and configuration in line with Information Security Manual (ISM) requirements.
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- Coordinate end-to-end software releases, ensuring appropriate testing, approval, and deployment controls are followed.
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- Manage high-priority incidents and provide timely resolution of critical production issues.
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- Maintain and update technical documentation,



including architecture and system design artefacts.
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- Provide technical leadership and guidance across application lifecycle activities.
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Required Skills & Experience n
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- Strong expertise in.NET Framework ,.NET Core , and C# development.
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- Extensive experience supporting and developing enterprise applications in Microsoft technology environments.
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- Strong knowledge of IIS and Windows Server-based web application hosting.
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- Proven experience across the full Software Development Lifecycle (SDLC).
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- Demonstrated experience working within structured Waterfall delivery frameworks.
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- Excellent problem-solving, troubleshooting, and stakeholder engagement skills.
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- Experience supporting business-critical systems in secure or regulated environments.
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Mandatory Requirements n
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- Active AGSVA NV1 Security Clearance is essential.
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- Ability to work full-time onsite in Laverton, Melbourne .
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- Australian Citizenship required due to the security-cleared nature of the environment.
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What's on Offer? n
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- Chance to work on mission-critical technology platforms.
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- Engage in complex technical challenges within a highly secure environment.
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- Join a collaborative team of experienced technology professionals.
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- Long-term contract potential within a major transformation and sustainment program.
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How to Apply n
nIf you are a security-cleared Senior .NET Developer with strong technical leadership experience and a passion for delivering reliable enterprise solutions, we'd love to hear from you.n
Contact: Farbar Siddiqn
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📌 .NET Technical Lead (Laverton)
🏢 Whizdom
📍 Laverton