Senior Mainframe Security Engineer (RACF)

The Opportunity

We are looking for a Senior Mainframe Security Engineer to join a specialist security team responsible for protecting and enhancing a large-scale enterprise mainframe environment.

This position will play a key role in maintaining secure access controls, supporting security initiatives, and driving improvements across critical systems. You will work with technology teams, risk and compliance stakeholders, and business leaders to strengthen security capabilities while ensuring stability and operational excellence.

What You'll Be Doing

- Lead the delivery and enhancement of mainframe security services and controls.

- Administer and optimise RACF security configurations across enterprise platforms.

- Support project delivery by providing security guidance during design, implementation, and testing phases.

- Identify opportunities for automation, process improvement, and operational efficiencies.

- Collaborate with risk, audit, and compliance teams to address security findings and control requirements.

- Develop technical standards, procedures, and supporting documentation.





- Perform security assessments and provide recommendations for continuous improvement.

- Mentor team members and contribute to the growth of security capability within the organisation.

What We're Looking For

- Extensive experience working in enterprise mainframe environments.

- Strong hands-on RACF administration and security management experience.

- Demonstrated knowledge of JCL and mainframe operations.

- Experience with tools such as ISPF, SDSF, and related mainframe technologies.

- Exposure to audit, governance, risk, and compliance processes.

- Scripting or development experience using REXX, Python, Assembler, or similar technologies.

- Ability to engage effectively with both technical and non-technical stakeholders.

- Solid analytical, troubleshooting, and problem-solving skills.

- Excellent written and verbal communication skills.

Desirable

- Experience within banking, financial services, or other highly regulated industries.

- SAS programming knowledge.

- Exposure to enterprise identity and access management practices.

📌 Mainframe Security Engineer (RACF) (Melbourne)
🏢 Seisma
📍 Melbourne