Remote IT Transition Manager: Legacy Modernisation

Sanderson Government & Defence; City Of London; Remote; GBP 101,000 - 133,000; Full time

Job summary

Sanderson Government & Defence is seeking an experienced Transition Manager to support a major IT transformation within a critical public-sector environment. You will plan and oversee the transition of services into new AWS-based, microservices architecture while ensuring business continuity.

The role is predominantly remote with travel to London or Manchester, requires UK residency, and offers a daily rate of £635.51 for the contract running 9 November 2026 to 30 June 2027.

Qualifications

• Proven experience as a Transition Manager within IT services, technology transformation or application modernisation programmes.
• Strong understanding of IT service transition, operational readiness and service handover.
• Experience defining and validating readiness criteria, including SLAs, support models and non-functional requirements.

Responsibilities

• Oversee the planning, coordination and execution of IT service transitions.
• Define, measure and validate service readiness metrics ahead of implementation.
• Establish and assess appropriate Service Level Agreements (SLAs) and operational support models.
• Ensure non-functional requirements are understood, documented and validated.
• Coordinate with technical teams, service owners and operational stakeholders to ensure a controlled transition.
• Identify transition risks, dependencies and potential service impacts, ensuring these are managed effectively.
• Ensure operational processes, support arrangements and documentation are in place before services go live.
• Maintain service continuity and minimise disruption during technology and application changes.
• Provide clear reporting on transition progress, readiness and outstanding actions.

Skills

Transition management

IT service transition

Stakeholder management

Remote delivery

Risk management

SLA definition

Tools

AWS

Java

COBOL

C++

Job description

Sanderson Government & Defence is seeking an experienced Transition Manager to support a major IT transformation within a critical public-sector environment. You will plan and oversee the transition of services into new AWS-based, microservices architecture while ensuring business continuity.

The role is predominantly remote with travel to London or Manchester, requires UK residency, and offers a daily rate of £635.51 for the contract running 9 November 2026 to 30 June 2027.