Mainframe Systems Engineer

Mainframe Systems Engineer

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Date: 21 Apr 2026

Location: Dublin, IE, IE

Company: Allied Irish Bank

At AIB, our values guide how we work and how we support each other. We’re looking for someone who puts Customer First, takes initiative and Owns the Outcome, and is always looking for ways to Eliminate Complexity. You’ll treat colleagues and customers with fairness and Show Respect, and you’ll thrive in a culture built on collaboration where we Be One Team to deliver meaningful impact.

Role: Mainframe Systems Engineer, Dublin

Location/Office Policy: Central Park, Dublin 18 - 3 days in Office per week

• Are you looking for an opportunity to work with a dynamic technology team in a fast‑paced environment, delivering outstanding results?
• Do you want to work on the IBM Mainframe platform a core technology that underpins multiple applications across AIB 
• Do you value a hybrid working model and a collaborative office culture, with three days per week based in Central Park, Dublin?

What is the Role:

• The role holder will be involved in the running and maintenance of AIB’s Mainframes hardware and software technology
• The role is part of a vibrant team who manage and maintain AIB’s Z Server and Mainframe Storage environments. The team has also the primary role on the installation of Software across the estate and interaction closely with multiple other teams who are key stakeholders in the wider ecosystem.

Key accountabilities:

• Support root cause analysis for major incidents and ensure robust, sustainable remediation.
• Work with vendors (e.g. IBM) to manage support engagements, defects and product roadmaps.
• Mentor and support junior engineers
• Performing end to end system diagnostics.
• Investigating and reporting: Performance monitoring and analysis.
• Willingness to provide out of hours support on the team Rota.
• Great opportunity to work in a Mainframe team. Opportunity to develop and learn new skills.
• Looking for someone who is highly motivated with the ability to work on own initiative
• Team player displaying ability to work with others within and outside the team. Someone with a strong interest in Technology with the ability to pick up new skills quickly.

What you Will Bring:

• At least 5 years’ experience as a systems administrator and/or Mainframe systems experience
• Some Mainframe experience desirable (TSO, ISPF, SDSF, JCL) but not essential.
• Knowledge of Mainframe subsystem technologies CICS, DB2, IMS, DB2, MQ, WAS
• Strong understanding of high availability, disaster recovery and resilience patterns for Mainframe Systems.
• Experience working in highly regulated, 24x7 production environments.
• Ability to lead technical decisions and communicate clearly with both technical and non‑technical stakeholders.

Why Work for AIB:

We are committed to offering our colleagues choice and flexibility in how we work and live and our hybrid working model enables our people to balance their time between working from home and their designated office, subject to their role, the needs of our customers and business requirements.

Some of our benefits include:

• Market leading Pension Scheme
• Healthcare Scheme
• Variable Pay
• Employee Assistance Programme
• Family leave options
• Two volunteer days per year

Please click here for further information about AIB’s PACT – Our Commitment to You.

Key Capabilities

• Technical Leadership
• Problem Solving & Critical Thinking
• Breadth of technical knowledge
• Systems and Technology Integration
• Collaborates
• Ensures Accountability

If you are not sure about your suitability based on any aspects of the role advertised, we encourage you to please contact the Recruiter for this role, Sarah Lyons, at careers@aib.ie for a conversation.

AIB is an equal opportunities employer, and we pride ourselves on being the first bank in Ireland to receive the Investors in Diversity Gold Standard accreditation from the Irish Centre for Diversity. We are committed to providing reasonable accommodations for applicants and employees. Should you have a reasonable accommodation request please email the Talent Acquisition team at careers@aib.ie

Disclaimer: 

Unsolicited CV’s sent to AIB by Recruitment Agencies will not be accepted for this position. AIB operates a direct sourcing model and where agency assistance is required, the Talent Acquisition team will engage directly with our recruitment partners.

Application deadline : Tuesday 5th May 2026

Job Segment: Recruiting, Systems Engineer, Mainframe, Bank, Banking, Engineering, Human Resources, Technology, Finance

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