Mainframe Administrator
26 days ago
Bracknell
Mainframe z/OS Administrator – Contract – Office Based We are seeking a Senior Mainframe z/OS Administrator / Systems Programmer to join a large enterprise environment supporting critical IBM Z infrastructure. This is a hands-on role focused on z/OS system administration, upgrades, performance tuning and disaster recovery within a 24/7 production estate. Key Responsibilities • Plan and execute z/OS upgrades, maintenance, PTFs and APARs, • Install, configure and support ISV products (Broadcom/CA, BMC, Rocket Software), • Manage IBM Z hardware including CPC, LPAR configuration, HMC/SE, IOCP/IODF, • Monitor and tune performance using RMF, SMF, TMON, SAS, WLM, • Support GDPS, IPL testing and disaster recovery execution, • Provide incident resolution and participate in on-call support Essential Skills • Strong hands-on experience with z/OS installation, configuration and support, • Proven experience delivering major z/OS upgrades, • Deep knowledge of LPAR, HMC, IOCP, IODF, FICON, OSA, Coupling Facility, • Experience supporting ISV tools (Broadcom, BMC, Rocket), • Performance tuning and capacity management expertise Desirable • GDPS exposure, • Automation tools such as OPS/MVS or System Automation, • Experience within large enterprise or regulated environments This role is ideal for a Senior z/OS Systems Programmer / Mainframe Infrastructure Engineer who thrives in complex, mission-critical environments and owns delivery from upgrade planning through to DR execution. Apply now to discuss full details and day rate