Technical Program Manager – Mainframe Modernisation (Retail Supply Chain & Logistics)

Gazelle Global; West Midlands; On-site; GBP 70,000 - 90,000; Full time

Job summary

Gazelle Global is seeking a Technical Program Manager to lead the modernization of mainframe systems for a large retail organization in the West Midlands. The role involves collaboration with various teams to ensure seamless transformation in logistics, focusing on the supply chain, distribution, and warehouse operations. Ideal candidates will have a proven record in managing large transformation programs and a strong understanding of retail logistics. Knowledge of cloud platforms and agile methodologies is advantageous.

Qualifications

• Proven experience leading mainframe modernisation or legacy transformation programs.
• Strong experience working in client-facing environments with senior business and IT stakeholders.
• Track record of managing large, multi-vendor, geographically distributed delivery teams.

Responsibilities

• Lead end-to-end delivery of large-scale mainframe modernisation programs supporting retail logistics.
• Define program roadmap, timelines, milestones, and delivery strategy.
• Collaborate with business stakeholders, supply chain teams, and IT teams.

Skills

Leading mainframe modernisation programs

Experience in client-facing environments

Managing multi-vendor delivery teams

Understanding of retail supply chain operations

Knowledge of Warehouse Management Systems

Understanding of omnichannel fulfilment models

Knowledge of cloud platforms

Experience working in Agile environments

Strong communication skills

Expertise in program governance

Job description

As a Technical Program Manager, we are seeking from you to lead the mainframe modernisation initiatives for a large scale retail organisation, with strong focus on supply chain, distribution, and warehouse operations.

You will work closely with warehouse, platform, and business teams to plan, coordinate, and deliver seamless transformation.

Responsibilities

• Lead end-to-end delivery of large-scale mainframe modernisation programs supporting retail logistics and supply chain operations
• Define program roadmap, timelines, milestones, and delivery strategy.
• Collaborate with business stakeholders, supply chain teams, and IT teams.
• Ensure delivery aligns with key retail trading cycles, peak seasons, and business-critical events.
• Partner with architects and engineering teams to define modern, scalable target-state architectures
• Drive migration, re-platforming, or decommissioning of mainframe systems with minimal operational disruption
• Own the transition of legacy mainframe applications used for retail supply chain processes such as: Store replenishment, Inventory management, Distribution centre operations, and Order fulfilment and allocations.
• Manage vendors, system integrators, and cross-functional teams.
• Identify risks, dependencies, and mitigation plans proactively.
• Track KPIs, program health, and provide executive-level reporting.
• Ensure compliance with quality standards, governance, and best practices.
• Lead change management and user adoption initiatives
• Drive continuous improvement of program delivery processes, tooling, and metrics.
• Ensure adherence to governance, security, and compliance standards.

Profile

Essential skills/knowledge/experience

• Proven experience leading mainframe modernisation or legacy transformation programs
• Strong experience working in client-facing environments with senior business and IT stakeholders
• Track record of managing large, multi-vendor, geographically distributed delivery teams.
• Strong understanding of retail supply chain and logistics operations.
• Hands-on or working knowledge of Warehouse Management Systems (WMS) in a retail context
• Understanding of omnichannel fulfilment models (store, DC, click & collect, ship-from-store)
• Knowledge of cloud platforms (Azure/AWS) is a plus.
• Experience working in Agile environments.
• Strong communication skills with the ability to engage engineering teams and senior stakeholders.
• Ability to manage multiple workstreams and competing priorities with minimal supervision.
• Expertise in managing large-scale transformation programs.
• Program governance and stakeholder management, Budget planning, cost tracking, and resource management, Risk management and escalation handling.