Mainframe Support Subject Matter Expert (SME)

Mainframe Support Subject Matter Expert (SME)

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Direct message the job poster from Paxus

Senior IT Recruitment Consultant at Paxus - Technology + Digital Talent

About the Role

We are seeking an experienced Mainframe Support Subject Matter Expert (SME) with deep technical expertise in z15 z/OS environments and niche mainframe systems administration skills. This is a hands-on, customer-facing role, responsible for maintaining mission-critical systems, delivering operational support, and ensuring system reliability in a 24x7 environment.

The ideal candidate will bring over a decade of experience in mainframe support, software migration, and maintenance, along with the ability to work effectively with both technical teams and business stakeholders.

Key Responsibilities

- Provide operational and technical support for mainframe systems in a z15 z/OS environment .

- Manage software maintenance, including patching and upgrading software using SMP/E .

- Perform operational monitoring, alerting, and tuning for system performance.

- Support application teams and management with mainframe expertise.

- Operate and monitor master console activities.

- Conduct in-depth analysis, troubleshooting, and resolution of incident/problem tickets.

- Maintain and enhance middleware, scheduler, and batch processing systems.

- Ensure security compliance through RACF and Natural Security administration.

- Build and maintain strong working relationships with technical teams and stakeholders.

- Provide 24x7 support including shift work and after-hours coverage.

Technical Environment

- Operating System: z/OS

- Database/Language: Adabas, Natural

- Transaction Processor: TSO, NIM

- Monitoring & Operational Support: XYMON, MXG, VPS/NIMSPL

- Middleware: MQ, Datastream, RPC, CORBA

- Scheduler/Batch Processor: CA-11, Jobtrac





- Job Language: JCL

- Security: RACF, Natural Security

- Source Code Management: N20

- Storage/Backup: Hitachi VPS5100, CA-1 (Tape Management)

Mandatory Requirements

- Australian citizenship (Baseline Security Clearance recommended).

- Minimum 10 years' experience in:

- Supporting mainframe environments.

- Mainframe software migration and maintenance processes.

- Automation scripting using SAS and REXX .

- z-platform and z/OS hardware and operating systems.

- Application control in mainframe architecture, middleware, and tooling.

- Batch technology from a support perspective.

To be considered for the role click the 'apply' button or for more information about this and other opportunities please contact Yash Kumar Jain on or email: and quote the above job reference number.

Paxus values diversity and welcomes applications from Indigenous Australians, people from diverse cultural and linguistic backgrounds and people living with a disability. If you require an adjustment to the recruitment process, including the application form in an alternate format, please contact me on the above contact details.

Seniority level

- Seniority level

Entry level

Employment type

- Employment type

Full time

Job function

- Job function

Information Technology
- Industries

Information Services

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📌 Mainframe Support Subject Matter Expert (Melbourne)
🏢 Paxus
📍 Melbourne