Software Engineer III

Job TitleMainframe Top Secret Security Administrator (Software Engineer III)Job TypeContract | Full-TimeCategoryApplications / Software DevelopmentDurationFebruary 2, 2026 – August 31, 2026Up to 600 total hoursPotential for renewal (up to three one-year extensions)Work LocationRemote / Telework (Work From Home)May require occasional after-hours or weekend support with prior approvalRole OverviewWe are seeking a senior-level Mainframe Top Secret Security Administrator to support legacy systems and mainframe modernization initiatives. This role serves as a subject matter expert (SME) for mainframe security and z/OS administration, ensuring secure, compliant, and reliable operation of mission-critical systems.The ideal candidate has deep hands-on experience with Top Secret Security (TSS), z/OS administration, certificate management, access controls, and mainframe operational support in highly regulated environments.Key ResponsibilitiesServe as the SME for Mainframe Top Secret Security (TSS) to maintain system security, compliance, and audit readinessPerform advanced z/OS systems administration, including configuration, upgrades, break/fix support, and ongoing maintenanceManage user access controls, security profiles, and certificate renewals (TLS/SSL, RSA keys, SFTP, FTPS)Provide technical support for system releases, upgrades, and infrastructure changesMonitor system performance, diagnose issues, and conduct root cause analysisSupport mainframe production control, scheduled jobs, and batch processingProvide end-user support for ISV tools such as BlueZoneCoordinate with network, customer support, and application teams to ensure stable daily operationsSupport data integration and change data capture processes (IMS, VSAM) as neededContribute expertise to both legacy system operations and mainframe transformation initiativesRequired Qualifications8+ years of hands-on experience with Top Secret Security (TSS)5+ years of hands-on z/OS administration experience5+ years working with:JES2z/OS UNIX System Services (OMVS)Storage Management Subsystem (SMS)3+ years of experience with TLS configuration, including certificates, SSL, RSA keys, SFTP, and FTPSStrong understanding of mainframe security, compliance, auditing, and risk mitigationPreferred QualificationsExperience with performance monitoring and initial performance analysisExperience with Informatica Power Exchange AdministrationExperience with REXX scriptingTechnical Knowledge (Preferred / Working Knowledge)z/OS Operationsz/OS Networking (VTAM, TCP/IP)Automated job scheduling tools (e.g., JOBTRAC)Terminal emulation tools (BlueZone)VTAM session management toolsSMP/ERMF, SMF, WLMJCLGRSVSAMTSOAdditional RequirementsAbility to access secure environments via remote access tools (e.g., GoToMyPC)May be required to work evenings, weekends, or holidays with prior approvalRequired Skills :Basic Qualification :Additional Skills :This is a high PRIORITY requisition.