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