Senior Mainframe Systems Manager (z/OS)📍 New York City – 100% Onsite💼 Full-Time | Permanent🚨 READ BEFORE APPLYINGThis is a true mainframe infrastructure leadership role.👉 NOT a COBOL developer role👉 NOT a cloud/Java/DevOps role👉 NOT a network engineer roleWe are specifically seeking candidates with hands-on mainframe systems programming + team leadership experience.🎯 WHAT YOU WILL OWNFull ownership of mainframe infrastructure operationsLead and manage a team of system programmersDrive stability, performance, and modernization of enterprise mainframe environmentsOversee 24/7 production operations, incident response, and system healthPlan and execute hardware/software upgrades (z/OS, storage, VTS, processors)Lead disaster recovery planning, testing, and executionDrive automation, performance tuning, and workload optimizationPartner across infrastructure, security, application, and data center teams🔴 MUST-HAVE (NON-NEGOTIABLE)10+ years of enterprise mainframe experienceProven experience in mainframe systems programming / infrastructureDeep expertise in:z/OSCICSDB2IMSStrong experience with:JES2, SMP/E, TSO/ISPF, SDSFHands-on experience supporting 24/7 production environmentsExperience with monitoring & performance tools (OMEGAMON, SMF)Proven incident ownership and system-level troubleshooting👉 If your experience is primarily application development (COBOL only) → not a fit🛠️ CORE INFRASTRUCTURE EXPERIENCESystem upgrades, patching, and maintenanceCapacity planning & system optimizationBatch processing & workload managementRoot cause analysis for:System failuresPerformance degradationJob abendsSecurity experience:RACF / mainframe security frameworks👔 LEADERSHIP REQUIREMENTSExperience leading or managing a mainframe teamDirect involvement in:Task delegationIncident escalationOperational decision-makingAbility to own production environments end-to-endStrong cross-functional collaboration across:InfrastructureSecurityApplication teamsVendors🚀 PREFERREDParallel Sysplex environmentsAutomation (REXX or similar)Mainframe modernization initiativesHybrid integration (mainframe + cloud/distributed systems)🎓 EDUCATIONBachelor’s degree in Computer Science, Engineering, or related field(or equivalent experience)⚠️ IMPORTANT ROLE DETAILS📍 Onsite: New York City (5 days/week)❌ No relocation assistance⏱️ Requires after-hours and on-call availability🏛️ Must comply with government security and technical standardsPlease confirm your hands-on experience with SMP/E, JES2, and system-level z/OS operations, along with the size of the team you currently manage.