Mainframe Infrastructure Engineer (Hybrid Role)

Responsibilities

• Platform & Infrastructure Operations
• Operate, maintain, and optimize z/OS LPARs, Sysplex, WLM, JES2/JES3, USS/OMVS, TSO/ISPF, SDSF.
• Install, configure, and maintain mainframe software using SMP/E and vendor best practices.
• Maintain system performance using RMF, SMF, OMEGAMON (or equivalent).
• Subsystem & Product Support (MF Application-Adjacent)
• Support and administer DB2 for z/OS, CICS TS, IMS (DB/TM), and IBM MQ: configuration, health checks, upgrades/maintenance, performance tuning, and high availability.
• Work with application teams for deployment validation, capacity estimates, SQL/CICS/IMS tuning, MQ channel/queue configuration, and resolving production incidents.
• Production Control & Scheduling
• Manage workload automation and batch scheduling with tools such as Control-M, CA-7, ESP/Autosys, or equivalent; ensure batch SLAs and critical path adherence.
• Troubleshoot JCL, dataset management, procs, condition codes, and abends; perform restart/recovery and reruns.
• Improve job streams for efficiency and reliability (dependency modeling, calendars, alerts, event-driven triggers).
• Storage Management
• Administer DFSMS (ACS routines, storage groups/classes), DFSMShsm (HSM policies, space management, migration/recall), and Catalog/ICF management (IDCAMS).
• Manage DASD and tape subsystems (e.g., DS8000, TS7700), volumes, VTOCs, data sets, and replication.
• Partner with backup/recovery teams on policy, FlashCopy/Snap, DR readiness, and test execution.
• Reliability, Security & Compliance
• Implement and maintain RACF/ACF2/Top Secret security controls; support audits and compliance (SOX, PCI, ISO, etc.).
• Participate in BCP/DR planning, testing, and documentation.
• Apply SRE/operational excellence practices: error budgets, toil reduction, problem elimination, and automation-first mindset.
• ITSM & Change Management
• Drive incident, problem, and change processes (e.g., in ServiceNow): root cause analysis, post-incident reviews, and controlled deployments.
• Author and maintain runbooks, SOPs, architecture diagrams, and knowledge articles.

Qualifications

• 5+ years in mainframe (z/OS) infrastructure or production support roles.
• Strong hands-on knowledge of z/OS, JES2/JES3, TSO/ISPF, SDSF, USS/OMVS, SMP/E.
• Practical experience with at least two of: DB2, CICS, IMS, IBM MQ (configuration, troubleshooting, performance).
• Production control experience with Control-M, CA-7, ESP/Autosys, or equivalent; deep JCL and batch troubleshooting skills.
• Storage fundamentals: DFSMS, DFSMShsm, ICF catalog/IDCAMS, DASD/tape operations, space/VTOC management.
• Proficiency with monitoring and performance analysis (RMF/SMF, OMEGAMON, or similar).
• Familiarity with RACF/ACF2/Top Secret concepts, access models, and audit support.
• Solid understanding of ITIL processes and experience using an ITSM tool (preferably ServiceNow) for incident/problem/change.
• Strong analytical, communication, and stakeholder management skills; ability to work in a follow-sun/on-call support model.