At a Glance
- Tasks: Lead the end-to-end implementation of mainframe product migrations with a focus on compliance and risk management.
- Company: Join a leading consultancy known for its expertise in technology transformations.
- Benefits: Competitive salary, flexible working options, and opportunities for professional growth.
- Other info: Work within a collaborative team and gain exposure to cutting-edge technologies.
- Why this job: Make a significant impact by managing complex projects in a dynamic tech environment.
- Qualifications: Experience in implementation management and strong knowledge of mainframe operations required.
The predicted salary is between 56700 - 69300 £ per year.
Mainframe Implementation Manager
Whitehall Resources currently require an experienced Mainframe Implementation Manager to work with a key client.
**Please note this role falls INSIDE IR35**
Role purpose: Plan, coordinate, and execute the end-to-end implementation of a mainframe product migration into production, ensuring a controlled, compliant, and low-risk cutover.
Own the integrated deployment/cutover plan, readiness, and go/no-go governance across technology, operations, business, and third parties.
Key responsibilities
- Create and maintain the integrated implementation (deployment/cutover) strategy and plan covering scope, approach (big bang/phased), timeline, dependencies, and critical path.
- Lead cutover planning: detailed runbooks, rehearsal plans, roles/responsibilities, communications, checkpoints, and contingency/rollback.
- Coordinate release and change management activities (CAB submissions, implementation approvals, change records, stakeholder signoffs).
- Drive environment and operational readiness: capacity, access, monitoring, scheduling/batch windows, support model, service transition.
- Manage data migration implementation activities with clear sequencing, validation steps, reconciliation, and operational controls.
- Orchestrate dress rehearsals / mock cutovers, capture lessons learned and harden runbooks.
- Lead implementation governance: readiness reviews, RAID management, decision logs, and executive reporting.
- Coordinate hyper care/post-go-live: incident triage, defect backlog prioritisation, stabilisation metrics, and handover to BAU.
- Ensure alignment with risk/compliance/audit requirements (evidence packs, approvals, segregation of duties where required).
- Manage third parties/vendors involved in deployment (e. g., infrastructure, platform, data, app support, schedulers).
- Deliverables (typical) • Implementation strategy and Integrated Cutover Plan
- Detailed cutover runbooks (minute-by-minute where needed) • Rehearsal plans and rehearsal outcomes/actions log
- Change/CAB artefacts and approval pack
- Readiness criteria, go/no-go checklist, and decision log
- Hypercare plan, support model, and BAU handover pack
- Implementation closure report and lessons learned
- Required experience
- Proven Implementation/Cutover/Deployment Management on mainframe or large-scale legacy migrations.
- Strong understanding of z/OS production operations constraints: batch cycles (JCL), scheduling (e. g., Control-M/CA-7), DB2/IMS considerations, CICS regions, interface dependencies, and resilience/DR practices.
- Experience running dress rehearsals, coordinating cross-team cutovers, and leading go/no-go forums.
- Working knowledge of ITIL-aligned change, release, and incident management in regulated environments.
Implementation Management Manager in Sheffield employer: Whitehall Resources
Join a leading global consulting business that values innovation and employee growth, offering a dynamic work culture where your expertise in SAP SuccessFactors can shine. With opportunities for career advancement and the chance to work on transformative HR projects across various exciting clients, this role provides not just a job, but a meaningful career path. Enjoy the flexibility of UK-wide locations and a supportive environment that encourages professional development while maintaining a healthy work-life balance.
