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# Mainframe DB2 System Specialist

- **Company:** GCS Ltd
- **Location:** Knutsford, UK
- **Contract:** Permanent contract
- **Skills:** System Configuration, IBM DB2, Monitoring of Systems, Job Control Language (JCL), Rexx (Programming Language), Mainframes, IBM Resource Access Control Facility, Broadcom, SQL Databases, System Programming, DevOps Tools - Open-source, System Availability
- **Published:** June 3, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/x/38153994/

## About the Role

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.

## Description

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.


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