zOS Mainframe Systems Programmer

Req ID:

Job Title: z/OS Mainframe Systems Programmer (Hybrid: remote + Sheffield)

Overview

NTT DATA are seeking an experienced z/OS Mainframe Systems Programmer to work on major projects, in one of the largest z/OS Mainframe environments globally. The role involves upgrading and supporting the z/OS operating system and ISV products, mainly from IBM and Computer Associates (CA).

Responsibilities

• Upgrading, maintaining and supporting the z/OS operating system
• Upgrading, maintaining and supporting ISV products particularly from IBM and Computer Associates (CA)
• Working closely with the other Engineering teams to ensure the systems that are built are stable, available, up to date and running as effectively and efficiently as possible
• Managing hardware and logical resources across LPARs:
• DASD and tape allocation via HCD/HCM
• LPAR configuration in HMC
• Security administration using RACF or equivalent

Ensuring data integrity and swift recovery:

DFSMShsm policies and recall management

FDR/ABR for high‑speed backups

FlashCopy or virtual tape replication for near‑instant restores

Optimizing system throughput and response times:

RMF and SMF report analysis

OMEGAMON or BMC MainView dashboards

WLM classification and tuning

Configuring and supporting mainframe connectivity:

VTAM and SNA definitions

TCP/IP stack on z/OS

OSA adapter and Coupling Facility communication

Executing OS and product upgrades with industry‑standard utilities:

SMP/E for PTF, APAR, and deliverable management

z/OSMF workflows for streamlined maintenance

Broadcom (e.g., Topaz), IBM, and BMC tooling for fix management and compliance reporting

Qualifications

• Multiple years of z/OS systems programming experience
• Strong Parallel Sysplex skills
• Proficiency with z/OS, TSO/ISPF, USS, SDSF, JCL, RACF
• Experience installing and maintaining IBM and CA products
• Deep mastery of z/OS architecture, including IPL procedures, JES2/JES3 configurations, Sysplex management, SMF data collection, and parmlib customization
• Proficient in writing and debugging system‑level routines and automation:
• Assembler for exits and control blocks
• REXX for scripting and batch utilities
• JCL for job submission, parameterization, and workflow control

Analytical troubleshooting of abends, storage hangs, and performance anomalies using:

Dump analysis with IPCS

SLIP and trace tools

System logs and console messages

Ensuring data integrity and swift recovery:

DFSMShsm policies and recall management

FDR/ABR for high‑speed backups

FlashCopy or virtual tape replication for near‑instant restores

Knowledge of performance monitoring, networking, and mainframe connectivity

Experience executing OS and product upgrades with industry‑standard utilities:

SMP/E for PTF, APAR, and deliverable management

z/OSMF workflows for streamlined maintenance

Broadcom (e.g., Topaz), IBM, and BMC tooling for fix management and compliance reporting

Project management and hardware refresh planning, including IPL scheduling, vendor coordination, and change‑control governance

Ability to produce clear system diagrams, runbooks, and upgrade plans while collaborating with application, storage, networking, and security teams

Strong documentation and communication skills

Experience in banking or large installations preferred

Confident, independent, able to contribute from day one

Excellent problem‑solving skills and a true team player

Availability for off‑hours support during software changes when required

Staying current on IBM Redbooks, z/OS release notes, firmware updates, and attending vendor training or industry conferences

Work Setup

Hybrid working: remote + on client site (Sheffield)

Benefits

You will enjoy a comprehensive, locally competitive benefits package.

Equal Opportunity Employer

NTT DATA is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. For our EEO Policy Statement, please click here. If you'd like more information on your EEO rights under the law, please click here. For Pay Transparency information, please click here.

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