Mainframe Developer

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DURATION: 6 months (Extension – very likely)

LOCATION: Remote – or 2 days onsite at Edinburgh/ Leeds or Manchester

WORKING HOURS: Standard business hours with out of hours support required

ONSITE REQUIREMENTS: Hybrid but can offered as Remote – Must be UK Based

DAY RATE: Market rates (Competitive)

LEGAL RIGHT TO WORK: Candidates must have the legal right to work in the UK. Sponsorship is not available for this role.

Atrium Global is supporting a client within the financial services sector who is seeking a highly experienced IBM MQ z/OS Administrator to join a specialist mainframe middleware team.

JOB OVERVIEW

This role sits within a mainframe-only environment and requires a contractor who can contribute immediately with minimal ramp-up. You will provide hands-on support and delivery across a critical IBM MQ estate on z/OS, focusing on production stability, incident resolution and controlled change delivery.

This is a pure z/OS MQ role – candidates with primarily distributed MQ or broader platform backgrounds will not be suitable.

RESPONSIBILITIES

  • Provide hands‑on administration of IBM MQ on z/OS across production environments
  • Deliver incident, problem and change resolution within strict SLAs
  • Support and maintain MQ queue managers, channels and configurations
  • Perform production deployments, upgrades and migrations
  • Troubleshoot complex MQ issues across mission‑critical systems
  • Maintain service stability, resilience and performance optimisation
  • Work closely with stakeholders across mainframe and infrastructure teams
  • Ensure adherence to governance, processes and security standards
  • Participate in out of hours support and deployment activities

REQUIREMENTS

  • Strong hands‑on experience administering IBM MQ on z/OS (v9.x preferred)
  • Proven experience working in mainframe‑only MQ environments
  • Deep understanding of:
  • Channels
  • MQ objects
  • Experience with TLS / SSL configuration and MQ security (RACF)
  • Strong troubleshooting skills within production MQ environments
  • Experience delivering changes independently into production
  • Familiarity with z/OS panels, ISPF and mainframe tooling
  • Experience working within ITIL‑controlled environments

NICE TO HAVE

  • Experience with MQ monitoring tools on z/OS (e.g. Omegamon)
  • Experience within UK banking or financial services environments
  • Experience supporting high‑volume payments or core banking systems

#J-18808-Ljbffr”, “datePosted”: “2026-05-04”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Atrium (EMEA)”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__422601897__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=31” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “City of Edinburgh” } } }
Company: Atrium (EMEA)
Apply for the Mainframe Developer
Location: City of Edinburgh
Job Description:

DURATION: 6 months (Extension – very likely)

LOCATION: Remote – or 2 days onsite at Edinburgh/ Leeds or Manchester

WORKING HOURS: Standard business hours with out of hours support required

ONSITE REQUIREMENTS: Hybrid but can offered as Remote – Must be UK Based

DAY RATE: Market rates (Competitive)

LEGAL RIGHT TO WORK: Candidates must have the legal right to work in the UK. Sponsorship is not available for this role.

Atrium Global is supporting a client within the financial services sector who is seeking a highly experienced IBM MQ z/OS Administrator to join a specialist mainframe middleware team.

JOB OVERVIEW

This role sits within a mainframe-only environment and requires a contractor who can contribute immediately with minimal ramp-up. You will provide hands-on support and delivery across a critical IBM MQ estate on z/OS, focusing on production stability, incident resolution and controlled change delivery.

This is a pure z/OS MQ role – candidates with primarily distributed MQ or broader platform backgrounds will not be suitable.

RESPONSIBILITIES

  • Provide hands‑on administration of IBM MQ on z/OS across production environments
  • Deliver incident, problem and change resolution within strict SLAs
  • Support and maintain MQ queue managers, channels and configurations
  • Perform production deployments, upgrades and migrations
  • Troubleshoot complex MQ issues across mission‑critical systems
  • Maintain service stability, resilience and performance optimisation
  • Work closely with stakeholders across mainframe and infrastructure teams
  • Ensure adherence to governance, processes and security standards
  • Participate in out of hours support and deployment activities

REQUIREMENTS

  • Strong hands‑on experience administering IBM MQ on z/OS (v9.x preferred)
  • Proven experience working in mainframe‑only MQ environments
  • Deep understanding of:
  • Channels
  • MQ objects
  • Experience with TLS / SSL configuration and MQ security (RACF)
  • Strong troubleshooting skills within production MQ environments
  • Experience delivering changes independently into production
  • Familiarity with z/OS panels, ISPF and mainframe tooling
  • Experience working within ITIL‑controlled environments

NICE TO HAVE

  • Experience with MQ monitoring tools on z/OS (e.g. Omegamon)
  • Experience within UK banking or financial services environments
  • Experience supporting high‑volume payments or core banking systems

#J-18808-Ljbffr…

Posted: May 4th, 2026