Senior Service Transition Manager

Join One Advanced

We’re looking for a Senior Service Transition Manager to lead the successful transition of IT services for one of One Advanced’s highest-priority customers, while also supporting other key strategic accounts and programmes where needed.

You’ll own the end‑to‑end transition process, ensuring new and changed services move smoothly into live operation with minimal disruption and maximum stability. From planning and governance through to testing, deployment, and operational readiness, you’ll make sure every transition is delivered to a consistently high standard.

Working with enterprise‑level accountability, you’ll apply One Advanced service transition frameworks and best practices to protect customer experience, ensure operational teams are fully prepared, and deliver stable live services from day one.

This is a hybrid role based out of our York or Birmingham office, with the expectation that the successful candidate will attend the office weekly or monthly as required.

Lead the successful transition of IT services into live operation, ensuring services are fully tested, operationally ready, and delivered with minimal disruption for key customers.

• Own the full service transition lifecycle from initiation through to operational acceptance
• Create and manage transition plans, timelines, dependencies, resources, and risk mitigation
• Ensure testing, training, documentation, and support models are completed before go‑live
• Act as the senior transition lead for customers, building trusted stakeholder relationships and managing escalations
• Drive governance, progress reporting, and adherence to service transition frameworks and ITIL best practices
• Identify, manage, and resolve risks, issues, and service impacts throughout transition and Early Life Support
• Own service acceptance criteria and act as the gatekeeper for live service handover into Operations
• Lead knowledge transfer, operational readiness, and post‑go‑live reviews for continuous improvement
• Collaborate across project, technical, operational, and supplier teams to deliver seamless transitions
• Track KPIs and provide clear reporting on transition quality, readiness, and service performance

You’ll be a confident service transition leader who can manage complex change, build trusted customer relationships, and ensure services move smoothly into live operation.

• Strong experience in IT Service Management or Service Transition within a senior customer‑facing role
• Proven success delivering complex transitions across multiple customers or programmes
• Good understanding of ITIL best practices, with ITIL and/or SIAM certification desirable
• Confident leadership with the ability to challenge and influence stakeholders effectively
• Strong risk management, problem‑solving, and decision‑making skills
• Clear communication across technical and non‑technical teams
• Ability to work independently, manage priorities, and maintain high service quality
• Flexibility to travel to customer sites when required

Wellbeing that means something

• 26 days’ holiday + bank holidays (and the option to buy more) plus 1 paid volunteering day every year
• Exceptional family leave
  , 26 weeks fully paid maternity/adoption, 4 weeks fully paid paternity, 22 weeks fully paid shared parental leave, plus 5 days paid bereavement leave
• Robust sick pay of up to 13 weeks full pay + 13 weeks half pay
• 24/7 Employee Assistance Programme for confidential support
• Private medical insurance for everyone
  , no medical‑history exclusions

Financial benefits that have your back

• Performance‑based rewards tailored to your role
  , from company‑wide bonuses to OTE and commission structures
• Income protection
  : up to 75% salary for 5 years if you ever need it

Grow your career with us

• Skills Hub learning platform with leadership pathways, future‑manager training, and a huge online library
• Access to external training and apprenticeships

Making a Difference

• Match It! Fundraise for a cause close to your heart and One Advanced will match part of the funding
• Pennies from Heaven donate the pennies from your pay check to help make a difference without lifting a finger

Plus plenty other flexible…