1 of 1 Contract z/OS Engineer Jobs in the UK

Mainframe Assembler Engineer (CICS / MQ / z / OS) Duration: 6 months Location: Edinburgh, Manchester OR Leeds Working Hours: Monday to Friday, standard business hours, plus participation in a 24 / 7 on-call rota Start date: 05 / 01 / 2026 Onsite Requirements: 2 days per week onsite Day Rate: £500 - Outside IR35 Gibbs Consulting is supporting a major financial services client with the appointment of an experienced Mainframe Assembler Engineer to join their Heritage Mainframe Engineering team. Job Overview This role is responsible for delivering both BAU operational support … and technical change within a mission-critical IBM z / OS environment. You will work across Assembler, CICS, and MQ components to ensure the stability, performance, and modernisation of core banking services. The position involves troubleshooting incidents, performance tuning, supporting project delivery activities, and participating in out-of-hours More ❯