z/OS Mainframe Engineer

Over ICU IT Services

ICU IT Services is a specialist in mainframe, midrange and open systems environments for clients in finance, government, insurance and logistics. We manage and modernize the critical foundations of Dutch organizations – from IBM Z and LinuxONE to hybrid cloud integrations. Mainframe, for us, is not legacy, but a high-tech engine that will last for decades to come.

What will you do?

• Manage and further develop z/OS 2.5 / 3.1 in a Parallel Sysplex environment on IBM z15/z16 with multiple LPARs and Coupling Facility.
• Install, update and maintain with SMP/E (PTF’s, APAR’s, RSU); create rollback and backup plans within change management.
• Fine-tune WLM, RMF, SMF and GRS to meet transaction SLAs; manage DFSMS, DFSMShsm, VSAM and catalog structures.
• Low-level troubleshooting: analyze dumps with IPCS, trace via GTF/CTRACE, investigate performance with RMF and Omegamon.
• Write and optimize JCL and REXX; automate with System Automation, Zowe and (in the future) Ansible for z/OS.
• Security and compliance: RACF policies, pervasive encryption, AT-TLS, ICSF and key management; discuss with application development teams (CICS, DB2, MQ, IMS).
• Participate in 24/7 standby duty (~1 week every 6 weeks) with clear compensation.

Our tech stack

• Platform: IBM z15/z16, LinuxONE, Parallel Sysplex, GDPS, HyperSwap.
• OS & Subsystems: z/OS 2.5 / 3.1, z/VM, CICS TS 6.x, DB2 12/13 for z/OS, IMS 15, MQ for z/OS, WebSphere Liberty, z/OS Connect EE.
• Security & Storage: RACF, ICSF, Crypto Express 8S, AT-TLS, MFA for z/OS, DS8950F, TS7770, DFSMS-suite.
• DevOps & Monitoring: Zowe, Ansible for z/OS, IBM DBB, Jenkins, Git on USS, Omegamon, Splunk, Dynatrace, Grafana.
• Languages & Tools: REXX, JCL, ISPF, Assembler (reading), COBOL (reading), Python on zCX.

What we are looking for

• Minimum 5 years of experience as a z/OS mainframe system programmer or engineer.
• In-depth knowledge of z/OS internals (address spaces, dispatching, virtual storage, IPL-flow, parmlib-concatenations) and fluency in JCL and REXX.
• Experience with SMP/E, change management (ITIL/ServiceNow) and maintenance window planning.
• Strong analytical skills and focus on security: you know that a RACF-profile with UACC(ALTER) is not a feature, but a mistake.
• Good command of Dutch and English; you document clearly and present your solutions persuasively.
• A plus would be: GDPS/HyperSwap, zCX, Ansible for z/OS, Zowe CLI, IBM certifications (System Programmer, RACF, DB2).
• Education and thinking level: Higher Professional Education (HBO);
• Relevant experience in a corporate environment;
• You can involve people in your solutions;
• Work in the Netherlands.

What we offer

• Salary € 4.500 – € 6.000 gross per month (for 40 hours), 8% holiday allowance, company car or travel expense compensation.
• Pension plan;
• 26 days of leave and a day off on your birthday;
• Clear career path with development and promotion opportunities;
• Flexible working hours and hybrid working – you determine the balance yourself.
• Support in your tasks: we come to you or you come to us. You work at the client, but remain part of our team, and that is felt;
• Flat organizational structure with a personal approach (honesty and pragmatism), a team where knowledge sharing is part of the DNA.

Interested?

For questions about this vacancy, please contact Ron Eland via email (recruiter contact). Your application will only be considered if you are an EU or UK resident (with a work permit). Want to just get acquainted? Call and make an appointment or follow our (information) events! You can also apply directly by clicking the "Apply for this vacancy" button.

ICU IT Services – Mainframe is not legacy, but leadership

We are filling this vacancy through our own recruitment department. Acquisition in response to this vacancy is not appreciated. Profiles and resumes submitted without request by agencies will be considered direct applications from the candidate.