Sr. Project Manager, Project Management (S3)

Job Description Purpose of the job

• The Senior Project Manager will lead the successful delivery of a technology transformation programme, overseeing the migration of a customer-facing technology platform from the existing solution to a third-party supplier platform.
• Acting as Collinson's delivery lead, the role will coordinate business, technology, product, operations and third-party supplier teams to deliver a complex programme involving platform migration, data migration, operational transition, customer onboarding, third-party integrations and service readiness.
• The role will be accountable for programme governance, supplier management, delivery assurance, stakeholder engagement, risk management and successful transition into business-as-usual operations.
• The successful candidate will operate with a high degree of autonomy and will be expected to drive delivery momentum across both Collinson and a third-party suppliers' team.

Key Responsibilities Programme Delivery

• Lead the end-to-end delivery of a large-scale business and technology transformation programme.
• Own programme plans, milestones, dependencies, budgets, risks and critical path management.
• Ensure delivery remains within agreed tolerances for scope, budget, timeline and quality.
• Establish and maintain programme governance, reporting and control frameworks.
• Drive successful delivery through multiple workstreams covering technology, operations, product, data and customer migration.
• Manage programme delivery from mobilisation through implementation, hypercare and operational handover.

Supplier & Partner Management

• Act as Collinson's primary delivery interface with a third-party supplier and other strategic suppliers.
• Establish and manage joint delivery governance forums, working groups and steering committees.
• Hold suppliers accountable for agreed deliverables, milestones, acceptance criteria and contractual commitments.
• Challenge delivery plans, estimates, assumptions and dependencies to ensure successful outcomes.
• Monitor supplier performance and drive corrective actions where required.
• Manage commercial implications arising from delivery risks, changes or delays.

Migration & Transition Leadership

• Lead technology, data, customer and operational migration activities.
• Manage migration readiness assessments, cutover planning and hypercare activities.
• Oversee legacy-to-target platform transition and phased customer onboarding waves.
• Coordinate business readiness activities to ensure successful adoption and operational continuity.
• Drive knowledge transfer and transition of operational processes between service teams and suppliers.
• Ensure service continuity throughout all stages of migration.

Operational Change & Service Readiness

• Lead operational transition planning and implementation activities.
• Coordinate service readiness, support model design, operational acceptance and training.
• Ensure new processes, tooling, reporting and operating models are embedded successfully.
• Oversee transition to BAU support teams and operational governance structures.
• Manage stakeholder engagement across technology, operations, customer service and commercial teams.

Design Workshops & Requirements Definition

• Co-facilitate and support cross-functional design and discovery workshops.
• Drive definition of project scope, target operating models, functional requirements and implementation approaches.
• Ensure decisions, assumptions and actions are documented, tracked and governed.
• Coordinate business and technical stakeholders to achieve timely decision-making and scope clarity.
• Support prioritisation and management of requirements throughout delivery.

Governance, Reporting & Stakeholder Management

• Build trusted relationships with sponsors, executives and senior stakeholders.
• Produce high-quality governance materials, steering committee packs and executive reporting.
• Provide transparent reporting on programme health, delivery progress, financial status and risks.
• Escalate issues proactively and recommend mitigation actions.
• Facilitate programme boards, steering committees and supplier governance meetings.
• Drive stakeholder alignment across multiple business functions and geographies

Risk, Dependency & Change Management

• Establish and maintain programme RAID logs.
• Identify and manage programme risks, issues, assumptions and dependencies.
• Lead impact assessments and mitigation planning activities.
• Own change control processes and governance.
• Evaluate delivery, cost, commercial and operational impacts arising from scope changes.
• Ensure key decisions are appropriately documented and approved.

Testing & Implementation

• Coordinate testing strategies including SIT, UAT, migration testing and operational readiness testing.
• Ensure implementation plans and exit criteria are clearly defined and agreed.
• Manage go-live planning, execution and post-implementation support activities.
• Ensure successful transition into operational support and service management structure.

Leadership

• Provide leadership and direction to cross-functional delivery teams operating in both internal and third-party delivery environments.
• Foster a collaborative, delivery-focused culture across internal and supplier teams.
• Promote best-practice project and programme management disciplines across the wider organisation.

Skills and experience required 1. Essential Skills Delivery Leadership

• Exceptional programme and project management capabilities.
• Strong planning, organisation and execution skills.
• Ability to operate effectively in complex, ambiguous environments.
• Strong critical thinking and structured problem-solving skills.

Stakeholder Management

• Outstanding stakeholder engagement and influencing skills.
• Ability to challenge constructively at executive level.
• Excellent workshop facilitation and decision-making capabilities.
• Ability to communicate effectively across business and technical audiences.

Commercial & Supplier Management

• Strong supplier governance and vendor management experience.
• Ability to manage delivery against Statements of Work and contractual obligations.
• Sound commercial awareness.
• Strong change control and scope management capabilities.

Risk & Governance

• Advanced risk management and dependency management skills.
• Strong governance and reporting discipline.
• Ability to identify emerging risks and drive proactive mitigation.

Communication

• Excellent written and verbal communication.
• Strong executive reporting and presentation skills.
• Ability to simplify complex delivery issues for senior audiences.

2. Essential Experience

• Minimum 8-10 years' experience leading complex technology and business transformation programmes.
• Proven experience delivering large-scale platform migration or SaaS transformation programmes.
• Proven experience managing third-party technology vendors and third-party delivery partners.
• Experience delivering data migration, integration and operational transition programmes.
• Experience managing customer onboarding, migration or deployment activities at scale.
• Experience leading governance, steering committees and executive stakeholder groups.
• Experience working in regulated industries such as Financial Services, Insurance, Travel or Payments.
• Experience managing geographically distributed teams and suppliers.
• Experience operating in both Agile and waterfall delivery environments.
• Strong budget ownership, financial governance and commercial management experience.

3. Desirable Experience

• Experience delivering customer-facing digital platforms.
• Experience within travel disruption, travel technology or travel insurance sectors.
• Experience of customer service or contact centre transitions.
• Experience of cloud migration programmes.
• Experience involving AWS, Azure, API integrations and microservice architectures.
• Experience of international supplier delivery models, particularly international delivery structures.
• Experience supporting programmes involving GDPR, PCI-DSS, ISO27001 or equivalent regulatory requirements.

4. Essential Qualifications

• PRINCE2 Practitioner, PMP, MSP or equivalent programme/project management qualification.
• Agile delivery certification or demonstrable Agile delivery experience.

Measures of Success Contractor Success Measures Success in role will be measured against

• Delivery of agreed programme milestones.
• Achievement of budget, scope and timeline commitments.
• Successful management of supplier performance and delivery outcomes.
• Successful migration and onboarding activities with minimal business disruption.
• Effective operational transition and service readiness.
• Timely risk identification and mitigation.
• Quality of governance and executive reporting.
• Stakeholder satisfaction across Collinson and supplier organisations.
. click apply for full job details