Mainframe Security Analyst £450-£500 p/d Inside IR35 Remote - 1 day per month required on-site in Welwyn Garden City 6 month contractLooking 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 changesSupport users with access queries and issuesMonitor daily security tasks, controls, and system alertsAdminister RBAC, PAM, and privileged access on the MainframeMaintain documentation including runbooks, processes, and proceduresSupport audits, evidence gathering, and remediation activitiesAssist with incidents, projects and wider security initiativesAnalyse, design and implement enhancements to Mainframe securityPerform testing for new security or system modificationsManage and maintain RACF digital certificatesCollaborate with IT and business teams to resolve access-related issuesRequired Experience:Strong RACF and z/OS expertiseExperience with IBM zSecure (z/Alert, Command Verifier, Access Monitor, CARLA)Skilled with Mainframe tools such as JCL, REXX, CLIST, ISPFSolid understanding of Mainframe security principlesExperience with RBAC, ICFR/SOX controls, and RRSFStrong documentation skills and lateral problem-solving abilityAbility to communicate clearly with technical and non-technical teamsExperience with ..... full job details .....