Mainframe Security Administrator

Mainframe Security Administrator (Top Secret Clearance Required)This contract role sits within a secure enterprise environment, focused on administering and maintaining mainframe security across IBM RACF and CA Top Secret platforms. The successful contractor will work closely with infrastructure and security teams to ensure robust access controls, certificate management, and compliance across z/OS environments.Responsibilities:Administer and configure IBM RACF and CA Top Secret security software, producing regular compliance and access reportsImplement and support digital certificates and PKI infrastructure across mainframe and distributed environmentsUtilise z/OS utilities including ISPF, TSO, SDSF, and JES to support daily operations and incident resolutionDevelop and maintain batch jobs and automation scripts using JCL, REXX, CLIST, and ISPFManage distributed security components including UNIX System Services, USS, and Kerberos integrationSupport SMP/E processes and contribute to system programming tasks as requiredKey Skills and Experience:Advanced hands on experience with IBM RACF and CA Top SecretProven experience with z/OS utilities and facilitiesStrong knowledge of PKI and digital certificate lifecycle managementProficiency in JCL, REXX, CLIST, and ISPF scriptingUnderstanding of distributed security technologies including UNIX, USS, and KerberosActive Top Secret clearance or eligibility to obtain itDesirable Skills:Familiarity with SMP/E installation and maintenance processes . Broader z/OS systems programming background