z/OS Systems Programmer in London

We are seeking a senior, hands-on z/OS Systems Programmer for a contract role supporting and optimising a complex IBM mainframe environment. This role focuses on system upgrades, performance tuning, and resolving high-impact production issues. Experience with Broadcom (CA) or equivalent mainframe tooling is highly desirable.

You will work independently, taking ownership of core z/OS subsystems and delivering reliable, high-quality outcomes in a demanding enterprise environment.

Key Responsibilities

Support, maintain, and optimise z/OS and core subsystems including JES2, WLM, TCP/IP, RACF integration , and system services

Lead SMP/E maintenance, IPL planning , PARMLIB updates , and z/OS upgrades

Diagnose and resolve complex production and performance issues

Manage DASD, system catalogues, HCD/HCM , and I/O configuration

Provide hands‐on expertise across system tuning and stability initiatives

Tooling Experience (Broadcom or Equivalent)

Broadcom/CA, BMC, IBM, ASG , or similar mainframe tools in areas such as:

Automation: OPS/MVS, System Automation, MainView, or equivalents

Scheduling: CA-7, Control-M, TWS/IWS

Tape & Storage Management: CA-1, RMM, TLMS

Skills & Experience

Strong REXX, JCL , and automation scripting skills

Proven ability to diagnose and resolve complex enterprise‐scale issues

Comfortable working independently in a production mainframe environment

#J-18808-Ljbffr