Database Administrator / Senior Infrastructure Engineer

Harrison McMillan Pty Ltd; Canberra; Hybrid; AUD 120,000 - 150,000; Full time

Job summary

Harrison McMillan Pty Ltd seeks an experienced Database Administrator / Senior Infrastructure Engineer with specialist database administration expertise across enterprise platforms. This 12-month contract is based in Canberra with hybrid arrangements and national travel options to Adelaide, Brisbane or Melbourne.

The role requires an NV1 Security Clearance before starting. You will lead upgrade projects, optimise performance and provide knowledge transfer across teams, ensuring data integrity

Qualifications

• Extensive experience administering SQL Server, Db2 z/OS, Db2 Midrange and MongoDB.

Responsibilities

• Provide specialist database administration across multiple platforms.
• Support database upgrades, migrations and performance tuning.
• Assess environments for upgrade, compatibility and operational risks.
• Optimise database performance and remediate issues.
• Ensure data consistency, integrity and availability.

Skills

SQL Server

Db2 z/OS

Db2 Midrange

MongoDB

Upgrade & migration

Containerised DB

Data integrity

Documentation

Knowledge transfer

Job description

At Harrison McMillan, our mission is simple: to change lives, one placement at a time. As a trusted recruitment partner to government and industry, we connect exceptional people with opportunities where they can make a genuine impact.

Harrison McMillan is seeking an experienced Database Administrator / Senior Infrastructure Engineer with specialist database administration expertise across enterprise database platforms.

This is a long-term 12-month contract with extension options up to 24 months and is based in Canberra, Adelaide, Brisbane, or Melbourne. Hybrid working arrangements are available.

Due to the nature of this role, An NV1 Security Clearance is required for the role prior to starting work under any contract.

Key Responsibilities:

• Provide specialist database administration expertise across SQL Server, Db2 z/OS, Db2 Midrange and MongoDB platforms.
• Support database upgrade, migration and optimisation activities.
• Assess database environments and identify upgrade, compatibility, migration and operational risks.
• Optimise database performance and remediate database issues.
• Ensure data consistency, integrity and availability.
• Support database technologies in containerised environments.
• Collaborate with technical teams on planning, testing and implementation activities.
• Produce technical documentation and support knowledge transfer activities.
• Experience supporting database platforms in containerised environments.
• Proven experience delivering controlled database upgrades and migrations while maintaining service continuity and data integrity.
• Experience working in complex government or enterprise ICT environments.
• Experience contributing to knowledge transfer, technical documentation and team capability uplift.

RFQ Closing Date: 28 October 2026