Mainframe Datacom Engineer - IBM Z

Salary: £? - ? per year

Requirements:

• Strong hands-on experience with Broadcom Datacom / CA Datacom.
• Excellent knowledge of Datacom architecture, utilities, database structures and performance tuning.
• Experience with backup/recovery, reorganisation and capacity management.
• Extensive IBM z/OS experience.
• Strong knowledge of JCL, TSO/ISPF, SDSF, CICS, VSAM, RACF and batch processing.
• Experience supporting COBOL applications.
• Strong troubleshooting and problem-solving capability.
• Understanding of database security, access control and audit requirements.
• Experience working within large-scale enterprise or highly regulated environments.
• Strong communication, stakeholder management and documentation skills.
• Spanish language skills at a professional or fluent level are highly desirable.
• Banking, payments or financial services experience is desirable.
• Experience with DevOps, automation and CI/CD is desirable.
• Knowledge of Git, Jenkins, Ansible, UrbanCode or similar tooling is desirable.
• Experience with API integration and application modernisation is desirable.
• Exposure to hybrid cloud and distributed platform integration with mainframe environments is desirable.
• Agile delivery experience is desirable.
• Broadcom Datacom certification or equivalent practical experience is desirable.

Responsibilities:

• Administer and support Broadcom Datacom / CA Datacom databases on z/OS.
• Perform database provisioning, configuration, monitoring, capacity planning and performance tuning.
• Undertake backup, recovery, reorganisation and database maintenance using Datacom utilities.
• Monitor availability and proactively resolve database and application performance issues.
• Support incident, problem and change management processes.
• Support IBM Z infrastructure, batch processing and associated mainframe technologies.
• Work with JCL, TSO/ISPF, SDSF, CICS, VSAM and RACF.
• Support COBOL-based applications and troubleshoot database/application issues.
• Assist with application releases, technical design and performance optimisation.
• Participate in disaster recovery and business continuity exercises.
• Contribute to mainframe modernisation, automation, API enablement, CI/CD and DevOps initiatives.
• Identify opportunities to improve operational efficiency through scripting and automation.

Technologies:

• API
• Ansible
• CI/CD
• CICS
• Cloud
• COBOL
• DevOps
• Git
• IBM
• Support
• JCL
• Jenkins
• Security
• TSO
• TSO/ISPF
• VSAM

More:

Our client is seeking an experienced Mainframe Datacom Engineer to support and enhance critical banking applications within a large-scale IBM Z / z/OS environment. The role is a 3 month initial contract with expected extensions, paying up to £500 per day inside IR35, and is fully remote. You will work closely with application development, infrastructure, DBA and international teams across Spain and Latin America. Spanish language skills are highly desirable. We are looking for a technically strong Mainframe Engineer with deep Datacom expertise and a modern engineering mindset who is comfortable supporting complex, enterprise-scale environments while contributing to the ongoing modernisation and automation of critical mainframe platforms.

last updated 36 week of 2026