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# Mainframe Night Operator

- **Company:** Mediaocean
- **Location:** London, UK
- **Contract:** Permanent contract
- **Skills:** Databases, Job Control Language (JCL), Issue Tracking Systems, Interactive System Productivity Facility (ISPF), Job Entry Subsystem 2/3, Mainframes, Z/OS, Control M
- **Published:** June 1, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=ad94dc5837269332

## About the Role

Do you have experience in Operating systems?, * Have sufficient technical expertise of z/OS, JES2 or JES3 operating systems, and related operating programs and facilities to effectively operate the Mediaocean mainframe system (TSO, ISPF, Ejes/SDSF, JCL, Beta92)

 * Work with self-initiative
 * Problem solving abilities
 * Knowledge of BMC AMIOPS, MAINVIEW and Control-M Tape would be an advantage
 * Knowledge of Jes3 DJC networking would be an advantage

## Description

As a Mainframe Night Operator, you'll play a critical role in ensuring the smooth operation of Mediaocean's mainframe systems during overnight hours. You'll monitor system performance, run production processes for both EU and US systems, and serve as the first line of defense in identifying and diagnosing technical issues. Ideal candidates are technically proficient, calm under pressure, and confident communicators who can collaborate effectively with senior and on-call support staff to resolve incidents and maintain operational excellence.

Responsibilities will include:

 * Operate z/OS JES3 operating system
 * Have sufficient technical expertise to monitor/maintain required customer response at all times
 * First level of error detection and diagnosis of all response time issues
 * Run daytime & nighttime production for EU & US systems
 * First level of error detection and diagnosis in all daily processes
 * Highlight and report on any failures, problem areas and incidents via Ops tickets
 * Maintain and monitor Ops ticket database and assign all tickets
 * Understand z/OS JCL and be able to perform initial problem diagnosis on failures
 * Produce clear incident reports and work logs via the ops ticket system
 * Communicate clearly and concisely with senior staff and on-call support staff during the problem resolution process


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