Mainframe Security Analyst

Mainframe Security Analyst

Contract Type:

Contractor

Location:

London

Industry:

IT

Contact Name:

Mark Stiles

Contact Phone:

Date Published:

26-Nov-2025

Mainframe Security Analyst

£450–£500 p/d Inside IR35

Remote – 1 day per month required on-site in Welwyn Garden City

6 month contract




Looking for an experienced Mainframe Security Analyst to join a dedicated Mainframe RACF Security team. This role focuses on protecting critical mainframe environments, supporting security initiatives, managing access controls and ensuring effective security monitoring.




Key Responsibilities:

  • Manage and action RACF access requests and changes
  • Support users with access queries and issues
  • Monitor daily security tasks, controls, and system alerts
  • Administer RBAC, PAM, and privileged access on the mainframe
  • Maintain documentation including runbooks, processes, and procedures
  • Support audits, evidence gathering, and remediation activities
  • Assist with incidents, projects and wider security initiatives
  • Analyse, design and implement enhancements to mainframe security
  • Perform testing for new security or system modifications
  • Manage and maintain RACF digital certificates
  • Collaborate with IT and business teams to resolve access-related issues

Required Experience:

  • Strong RACF and z/OS expertise
  • Experience with IBM zSecure (z/Alert, Command Verifier, Access Monitor, CARLA)
  • Skilled with mainframe tools such as JCL, REXX, CLIST, ISPF
  • Solid understanding of mainframe security principles
  • Experience with RBAC, ICFR/SOX controls, and RRSF
  • Strong documentation skills and lateral problem-solving ability
  • Ability to communicate clearly with technical and non-technical teams
  • Experience with digital certificate management

...

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