Mainframe Security specialist

A NYC government agency in Manhattan, NY is seeking a skilled Security Specialist to support its mainframe and enterprise security operations. This position reports directly to the Application Security Manager and focuses on safeguarding critical applications, databases, and infrastructure using CA’s mainframe security software (ACF2, Top Secret, or RACF). The ideal candidate will bring strong expertise in mainframe security administration, a deep understanding of role-based access control, and proven experience ensuring compliance with enterprise and industry security standards. This role requires hands-on experience in managing access, developing rules, troubleshooting security issues, and collaborating across IT teams to maintain a secure and resilient environment. Primary Responsibilities Administer ACF2 access controls for TSO (ISPF), application data, and system files, including JCL and program libraries Develop and maintain ACF2 rules based on authorization requests from agency security officers Configure access for datasets, DB2 databases, IMS databases, transactions, LDAP, CA-Scheduler, and JES2 services Manage user groups and provisioning, including additions, modifications, and removals Perform security product testing and upgrades Maintain documentation for product usage, procedures, and security configurations Install and manage digital certificates, perform re-certifications, and handle password resets Monitor and review access violations; generate reports on user access and rule changes Perform rules library backup and restoration; support ongoing security education and compliance efforts Required Skills & Experience Hands-on experience with ACF2, including creating security profiles, user-ID administration, and password resets Experience with Top Secret or RACF (highly preferred) In-depth knowledge of information security policies, regulatory requirements, and industry best practices Strong troubleshooting skills in production mainframe environments Knowledge of z/OS, JES2, SMP/E, TSO, IOF, JCL, IOCP/HCD Familiarity with monitoring tools such as TMON, Mainview, OMEGAMON Experience with automation and development tools (COBOL, REXX, JCL, PROCS, CTLCARDS) Database experience with IMS and DB2 Understanding of role-based security models and enterprise-wide security administration Familiarity with CA Scheduler, Workload Automation dSeries, or equivalent scheduling tools Knowledge of file transfer protocols such as FTPS and Connect:Direct Exposure to Rational tools (ClearQuest, ClearCase) and PeopleSoft PeopleTools is a plus Strong communication, documentation, and problem-solving skills Ability to adapt quickly in large-scale government or financial environments with evolving security requirements Education Bachelor’s degree in Computer Science, Information Systems, or a related technical field OR 10+ years of relevant mainframe/security experience in lieu of a degree Seneca Resources is proud to be an

Equal Opportunity Employer , committed to fostering a diverse and inclusive workplace. We encourage all qualified individuals to apply.

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