Senior Service Transition Manager in York

When a customer moves their IT services to OneAdvanced, the first few months shape how they feel about us for years to come. OneAdvanced IT Services delivers managed IT, cloud and security services to large enterprise and public sector organisations across the UK. As our Senior Service Transition Manager, you will make sure every move into our care is smooth, well planned and built to last.

You will take services on from previous suppliers and in-house teams, for new customers and for existing customers adding new services. Reporting to our Head of Service Management & Reliability, you will have no direct reports. Instead, you will lead through influence, bringing project, technical, operational and supplier teams together behind one clear plan.

This is a hybrid role, based mainly from home, with occasional travel to our Birmingham and York offices and to customer sites across the UK during service take-ons and early life support, typically no more than one night away every other week.

What You Will Do

• You will own each transition from the first plan through to a stable, settled service that our Operations teams are proud to take on.
• Deliver transitions from start to finish to an agreed plan, staying on top of risks, issues, dependencies and resourcing.
• Check each service against agreed acceptance criteria and give a clear, evidence-based recommendation on whether it is ready to go live.
• Make sure support models, documentation, training and knowledge transfer genuinely work before go-live, not just look good on paper.
• Plan and run cutovers, including the handover away from outgoing suppliers or in-house teams.
• Guide new services through their early life support period until they are running smoothly day to day.
• Lead regular progress meetings and reporting with customers, being honest about where things stand and raising issues early.
• Use AI and automation to take the manual effort out of planning, documentation, tracking and reporting.
• Review each transition once it is complete and carry the lessons into the next one.

What You Will Have

• You will bring hands-on transition experience and the calm, honest judgement that keeps customers and colleagues on side.
• Experience in IT service transition, ideally on the supplier side at a managed service provider, outsourcer or systems integrator.
• Hands-on experience producing the core transition documents, from service design and acceptance criteria to knowledge transfer plans and early life support exit criteria.
• A track record of bringing together teams you don’t manage, inside and outside the business, to meet a shared deadline.
• The confidence to hold your ground under pressure, and the judgement to know when to escalate or adapt.
• The ability to explain a recommendation in plain English to customers without a technical background.
• ITIL 4 Foundation, with further ITIL, SIAM or PRINCE2 qualifications a bonus.
• A genuine interest in using AI to improve how services are delivered.
• Willingness to travel to customer sites and support cutovers outside normal working hours.

Applications close on Sunday 15 November 2026, so please apply before then to be considered.

What We Do For You

• 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.
• Pension with 5% matched company contributions.
• Life assurance worth 4x your salary from day one.
• Free financial planning session with the option to engage in more tailored financial coaching.
• Grow your career with us: SkillsHub learning platform with leadership pathways, future-manager training, and a huge online library.
• Access to external training and apprenticeships.
• Making a Difference: MatchIt! Fundraise for a cause close to your heart and OneAdvanced 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 benefits to suit your lifestyle on our RewardHub, including: ULEV car scheme with 1,000+ models, Dental insurance, Health Cash Plan, Critical Illness Cover, Partner Life Cover, Health Assessment, Gym Membership.

Who We Are

At OneAdvanced, we are at the forefront of delivering sector-focused technology solutions that simplify complexity, drive meaningful progress, and help build a fairer, more inclusive society. We’re much more than a software company. We deliver SaaS workflow applications and IT services that power organisations across Education, Government, Healthcare, Legal, Manufacturing, Housing, Retail, and more. OneAdvanced is one of the UK’s largest business software and services companies. Based in Birmingham (The Mailbox), operating across the UK, Ireland, India, and Australia. Our secure, scalable platform, including OneAdvanced AI, our private AI service for UK organisations, powers connectivity and innovation across critical sectors. Alongside our software are our IT services, including hosting, managed services, and application modernisation. We strive to create an inclusive workplace that drives innovation and collaboration, championing diverse perspectives and ideas. Our Environmental, Social and Governance (ESG) strategy is embedded in everything we do, guiding us to create meaningful impact for our people, our customers and the planet. Proud to be recognised in the Financial Times’ Best Employers 2026 list for the second-year running, an independent and data led ranking based on employee feedback. Join us and become part of a team that’s powering the world of work and making a real difference.