CICS, MQ & z/OS Mainframe Systems Programmer Job at Vertali Ltd (Bromsgrove)

Job Description

We are seeking an experienced CICS, MQ, and z/OS Systems Programmer to support, enhance, and modernise our mission‑critical IBM Z environments. This role is central to the stability, performance, and resilience of our core transaction‑processing platforms. You will work across installation, configuration, performance engineering, incident resolution, and continuous improvement, ensuring our systems remain secure, compliant, and highly available. The ideal candidate brings deep technical expertise, strong problem‑solving skills, and the ability to collaborate with cross‑functional teams in a fast‑moving enterprise environment.

Job Responsibility

Install, upgrade, configure, and customise IBM CICS Transaction Server and IBM MQ across multiple z/OS environments
Design, implement, and maintain CICS intercommunication capabilities, including transaction routing, distributed program link (DPL), MRO, IPIC, and web enablement
Administer and optimise MQ queue managers, channels, queues, and associated security and recovery processes
Maintain and tune VSAM datasets, CICS exits, and supporting assembler routines
Conduct system testing including integration, regression, concurrency, and failover scenarios
Diagnose and resolve complex issues using IPCS, system traces, dumps, logs, and performance data
Perform root cause analysis (RCA) and deliver actionable recommendations to prevent recurrence
Lead or contribute to performance tuning, capacity planning, and workload optimisation initiatives
Support compliance, audit, and security requirements, including RACF and platform hardening
Produce clear technical documentation, operational procedures, and stakeholder reporting
Collaborate with application, infrastructure, and security teams to support change, release, and modernisation programmes

Requirements

Solid hands‑on experience with IBM CICS Transaction Server and IBM MQ in large‑scale z/OS environments
Strong understanding of CICS architecture, regions, RDO, CPSM/CICSPlex, and intercommunication facilities
Solid experience with MQ administration, including clustering, security, logging, and recovery
Good working knowledge of CTG (CICS Transaction Gateway) and its integration patterns
Strong z/OS systems programming background, including JCL, SMP/E, WLM, JES2, and subsystem integration
Proficiency with RACF and mainframe security concepts
Demonstrated capability in performance tuning, problem determination, and high‑severity incident resolution
Experience supporting modernisation initiatives, such as APIs, REST enablement, Zowe, DevOps tooling, or hybrid‑cloud integration
Ability to produce high‑quality documentation and communicate effectively with technical and non‑technical stakeholders

Nice to have

Experience with DB2, IMS, or MQ on distributed platforms
Familiarity with automation tools (OPS/MVS, System Automation, Control‑M, TWS)
Exposure to observability tooling, SMF analytics, or performance monitoring suites
Knowledge of CICS web services, Liberty, or Java integration on z/OS
Participation in on‑call or 24/7 support environments

What we offer

A comprehensive, locally competitive benefits package
The opportunity to work on high‑availability, enterprise‑scale IBM Z platforms
A key role in shaping modernisation, performance, and resilience strategies
Collaboration with experienced engineers across infrastructure, security, and application domains
A stable environment with room for technical depth, innovation, and continuous learning

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CICS, MQ & z/OS Mainframe Systems Programmer

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