Mainframe Middleware Infrastructure Engineer (CICS Liberty)

Mainframe Middleware Infrastructure Engineer (CICS Liberty)
6-12 Month Contract | London or Edinburgh | Hybrid (2-3 Days Onsite) | Excellent Day Rate

We're looking for an experienced Mainframe Middleware Infrastructure Engineer with strong expertise across CICS, z/OS and IBM WebSphere Liberty to support a major enterprise transformation programme. This role focuses on the engineering, configuration, optimisation and support of modern Java workloads running within CICS Liberty environments.

Key Skills & Experience:
Deep knowledge of CICS systems engineering and z/OS infrastructure
CICS region setup, configuration and JVM server management
IBM WebSphere Liberty administration and runtime configuration
Java workload management, JVM tuning and performance optimisation
RACF, TLS, certificates, keyrings and security integration
REST/API enablement and modern integration practices
Problem determination using dumps, traces, logs and SMF data
Capacity planning, resilience, HA/DR and operational support
Experience with CI/CD pipelines, automated deployments and release processes
Monitoring, observability and middleware operational management

This is an excellent opportunity to work on critical banking and financial services infrastructure whilst helping modernise core mainframe platforms with contemporary Java and API technologies.

For more information and direct contact with me, please send me an email and call only if required. I will be sure to check responses daily and shortlist the best candidates; if you are shortlisted, you will hear from me.