Platform Engineer - Mainframe

Mō te tūranga | About the Role

Join Westpac New Zealand as a Platform Engineer and play a key part in delivering business and technology outcomes within our Mainframe environment. You’ll help ensure our banking platforms are reliable and support critical applications, contributing to technology roadmaps that guide continuous improvement and modernisation. As part of our Technology team, you’ll share knowledge, mentor peers, and collaborate to solve complex platform challenges.

Ko tō mahi | What you’ll do

• Be a strong communicator by sharing clear, timely, and tailored information within your team.

• Manage and resolve Mainframe incidents and service requests within SLA, taking ownership of response and contributing to post-incident reviews.

• Enhance Mainframe monitoring, alerting, and automation to proactively prevent issues and reduce manual interventions.

• Collaborate with suppliers and third-party partners to ensure effective management and support of z/OS systems in alignment with WNZL policies and audit requirements

• Maintain accurate technical documentation, runbooks, and SOPs for Mainframe processes; share knowledge with peers.

• Monitor Mainframe system performance, forecast capacity needs, and optimize configurations for reliability and throughput.

• Collaborate with application and infrastructure teams to right-size workloads, standardize Mainframe configurations, and provide actionable insights.

• Escalate platform risks early, support disaster recovery testing and drive automation initiatives including PIV testing.

Nā tāu rourou | What will you bring?

• 2–5 years’ experience in infrastructure and platform engineering, ideally with exposure to Mainframe environments.

• Knowledge of Mainframe technologies (z/OS, utilities, platform tools) and openness to learn across multiple Mainframe domains.

• Curiosity and adaptability to work through transition processes and evolving responsibilities.

• Understanding of automation and scripting (e.g., REXX, JCL) and willingness to build skills in Mainframe automation.

• Familiarity with Mainframe toolsets such as Endevor, XCOM, DB2, MQ, and scheduling tools (Jobtrac, CA7, Control-M).

• Strong communication skills to translate technical concepts into business language and collaborate across technical teams.

• Advantageous skills: basic z/OS systems programming, COBOL application development exposure, SQL and Mainframe monitoring tools knowledge.

Westpac Hei Wāhi Mahi | Working at Westpac

In addition to immersing yourself in a supportive team environment, you'll receive some great job perks and benefits including:

• 4 weeks standard holiday + 5 additional days of wellbeing leave to support you to be your best

• Additional purchased leave options up to 4 weeks per year

• Banking benefits, insurance discounts and superannuation scheme

• Growth and development – we provide opportunities for development and promote internal mobility

• Recognition - we recognise and reward our star performers

• School holiday subsidy - help you balance work and family during school holiday

• 2 Volunteer days per year

Ko mātou tēnei | Our Organisation
At Westpac, we’re working together to build a fairer and stronger New Zealand for our people, customers, and communities. For over 160 years we’ve been driven by our purpose to Create Better Futures Together.

What makes us unique are the incredible people we’re lucky enough to have walk through our doors every day. The giant ‘W’ on our building doesn’t just stand for Westpac – it says, double you. We’re a place that values, rewards and recognises individuality. Where you can be your whole self, your true self, and your best self. We’re recognised as a place where talent is developed, where passions are fuelled and where ambitions of all shapes and sizes thrive. And it all starts with you!

Tono mai ināianei! | Apply Now!

Apply today with your CV and Cover Letter. 

The people of Aotearoa, New Zealand hail from many cultures and backgrounds. At Westpac New Zealand, we draw on this enormous talent pool to cultivate a team rich in ability and empowered to reach its full potential. Our aim is to be brave challengers, celebrating our differences and relentlessly advocating for our customers. It starts with us – we believe that when we care deeply and do our best for our people, they’ll do their best for our customers. We encourage people from all walks of life to apply, including those who are neurodiverse, have chronic health conditions or disabilities – your attitude and passion are as important to us as your experience, qualifications and capabilities. 

Mahi tahi tātou, kaha ake tātou | Together Greater

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