Mainframe DB2 System Specialist

Mainframe DB2 System Specialist - Knutsford or Glasgow Join our Mainframe Engineering function as a DB2 System Specialist, where you'll take ownership of installing, configuring, and maintaining IBM DB2 systems that power mission‑critical banking platforms. This is a hands‑on, engineering‑focused role for specialists who thrive on performance, reliability, and automation at scale. What You'll Do Install and maintain IBM DB2 - Lead installation, upgrades, and maintenance of DB2 and related tooling (DB2 CA, DB2 Connect, Data Studio). Optimise system performance - Tune, monitor, and troubleshoot DB2 subsystems to ensure high availability and efficiency. Engineer mainframe automation - Reduce manual effort and operational risk by enhancing automation across the DB2 environment. Act as a DB2 Systems Programming expert - Serve as a senior technical authority for DB2 internals, RACF integration, and subsystem behaviour. Support transformation and reliability - Contribute to change, risk, and reliability initiatives across the mainframe estate. What You'll Bring Proven DB2 Systems Programming experience with installation, maintenance, upgrades, and tooling. Strong mainframe fundamentals including TSO, JCL, REXX, SQL, and z/OS operational knowledge. Deep understanding of DB2 performance, optimisation, and monitoring techniques. Hands‑on experience with automation and DevOps tooling such as VS Code, Db2 Developer Extensions, or similar. Knowledge of z/OSMF, Broadcom/IBM DB2 tools, DB2 internals, and RACF security. Ability to operate in a risk‑controlled, transformation‑driven environment. GCS is acting as an Employment Agency in relation to this vacancy