Mainframe Cyber Security Analyst - RACF

Tesco UK; Welwyn Garden City; Hybrid; GBP 45,000 - 65,000; Full time

Job summary

A leading retail company in the UK seeks a RACF/z/OS Specialist to manage user requests and ensure efficient operational security. The ideal candidate should have extensive knowledge of RACF and z/OS components, with strong problem-solving skills. The role involves responding to security alerts, administering access management, and maintaining internal documentation. This opportunity offers a hybrid working model, reflecting our commitment to inclusivity and flexibility.

Benefits

Flexible working patterns

Inclusive culture

Training and development opportunities

Qualifications

• Extensive knowledge and experience in RACF/z/OS with related z/OS components.
• Strong understanding of Mainframe security concepts and technologies.
• Experience with IBM zSecure tools, including z/Alert and Access Monitor.

Responsibilities

• Respond to user requests in the RACF ticketing system.
• Review change requests for RACF access.
• Monitor daily tasks for operational efficiency.
• Respond to security alerts from mainframe security monitoring.

Skills

Extensive RACF/z/OS knowledge

Understanding of security concepts

Use of IBM zSecure

Experience with mainframe languages

Problem-solving skills

Effective communication

Understanding of Role Based Access Controls (RBAC)

Experience in digital certificate management

Job description

Responsibilities

• Respond to user requests and issues assigned to the in RACF ticketing system.
• Review and action change requests for RACF access.
• Monitoring of daily tasks and controls are running to maintain operational efficiency.
• Respond to security alerts received from mainframe security monitoring.
• Administration of the RACF Roles Based Access application (RBAC)
• Administration of the RACF privileged access management (PAM)
• Recertification of access to roles with data owners.
• Create, review and maintain internal documentation (Run books, processes and procedures).
• Assist in audit evidence and remediation activities.
• Follow up on access management deficiencies identified in risk reviews, self‑assessments, risk assessments and internal and external audits.

Qualifications

• Extensive RACF/z/OS Specialist knowledge and experience with an understanding of other related z/OS components.
• An understanding of security concepts and technologies within a Mainframe environment.
• Use of IBM zSecure - including z/Alert, Command Verifier, Access Monitor and RACF Offline and CARLA reporting.
• Knowledge of IBM RACF Mainframe security software & configuration.
• Experience with mainframe languages such as: JCL, REXX, CLIST, ISPF etc.
• Experience in documenting working processes/procedures and support activities to a high standard.
• Substantial problem‑solving skills; able to think laterally and conceptually.
• Ability to communicate effectively with team and others, in a style appropriate to the audience.
• Understanding of Role Based Access Controls (RBAC).
• Understanding of ICFR controls - (previously Sarbanes‑Oxley).
• Experience on digital certificate management & implementation.
• Knowledge of RACF remote sharing facility (RRSF).

Our vision at Tesco is to become every customer's favourite way to shop, whether they are at home or out on the move. Our core purpose is ‘Serving our customers, communities and planet a little better every day’. Serving means more than a transactional relationship with our customers. It means acting as a responsible and sustainable business for all stakeholders, for the communities we are part of and for the planet.

We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We’re committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities. We’re proud to have been accredited Disability Confident Leader and we’re committed to providing a fully inclusive and accessible recruitment process. For further information on the accessibility support we can offer, please click here.

We’re a big business and we can offer a range of diverse full‑time & part‑time working patterns across our many business areas, which means that we can find something that works for you. We work in a more blended pattern - combining office and remote working. Our offices will continue to be where we connect, collaborate and innovate. If you are applying internally, please speak to the Hiring Manager about how this can work for you - Everyone is welcome at Tesco.