Description
Technical Project Manager (Sage X3) - Hybrid Contract 1 Meeting Per Month - Inside IR35
Role Purpose
The Technical Project Manager will take full end-to-end ownership of the implementation of Sage X3, replacing the existing Agresso (Unit4) finance system. The role is delivery-focused and hands-on, accountable for planning, execution, stakeholder engagement, and successful go-live, ensuring the new system meets business, financial, and compliance requirements.
This individual will act as the single point of accountability, bridging finance, IT, implementation partners, and senior stakeholders.
Ideal Candidate Overview
This role suits a pragmatic, delivery-driven ERP / Finance Project Manager with deep experience implementing finance systems in complex organisations. They will be comfortable operating at both strategic and operational levels, able to roll up their sleeves while maintaining control of governance, risk, and delivery milestones.
They will have a strong understanding of finance processes, proven experience of ERP migrations, and the confidence to challenge stakeholders where required.
Core Responsibilities
Programme & Delivery Ownership
Take full ownership of the Sage X3 implementation lifecycle: discovery, design, build, test, data migration, cutover, and post-go-live stabilisation
Develop and manage a detailed project plan, budget, resourcing model, and delivery roadmap
Own project governance, RAID logs, and reporting to senior stakeholders
Stakeholder & Partner Management
Act as the primary interface between:
Finance leadership and end users
IT and data teams
Sage X3 implementation partners and vendors
Manage third-party partners, holding them accountable for scope, quality, and timelines
Facilitate workshops and design sessions to translate business requirements into system solutions
Finance & Systems Expertise
Lead the migration from Agresso (Unit4) to Sage X3, including:
Chart of accounts redesign
Data migration and reconciliation
Reporting and consolidation impacts
Ensure system design supports:
Financial controls
Audit requirements
Regulatory and statutory reporting
Hands-On Execution
Be actively involved in:
Requirements definition
UAT planning and execution
Cutover planning and go-live readiness
Proactively identify and resolve issues rather than escalating prematurely
Change & Adoption
Support business change, user readiness, and training strategies
Ensure finance teams are confident and operationally effective post-implementation
Required Experience & Background
Essential
Proven track record delivering ERP finance system implementations as Project Manager
Direct experience implementing Sage X3
Experience replacing or migrating from Agresso / Unit4 or similar legacy finance platforms
Strong understanding of:
General ledger
AP / AR
Fixed assets
Budgeting, reporting, and financial controls
Experience managing external system integrators and vendors
Desirable
Background in finance transformation or systems roles
Experience working in multi-entity or multi-currency environments
Formal project management qualification (PRINCE2, PMP, Agile, or equivalent)
Key Skills & Competencies
Delivery-focused: Prioritises outcomes over theory
Hands-on: Comfortable operating in the detail, not just steering from above
Commercially astute: Understands cost, value, and business impact
Structured & organised: Strong planning, documentation, and reporting discipline
Resilient & assertive: Able to challenge senior stakeholders and suppliers
Clear communicator: Translates technical detail into business-friendly language
Personality & Working Style
Accountable and ownership-driven
Calm under pressure, particularly around go-live
Pragmatic problem-solver
Credible with finance leaders and technical teams alike
Success Measures
Sage X3 delivered on time, on budget, and fit for purpose
Clean data migration and successful cutover
Minimal post-go-live disruption
High user adoption and confidence within finance teams
Role Purpose
The Technical Project Manager will take full end-to-end ownership of the implementation of Sage X3, replacing the existing Agresso (Unit4) finance system. The role is delivery-focused and hands-on, accountable for planning, execution, stakeholder engagement, and successful go-live, ensuring the new system meets business, financial, and compliance requirements.
This individual will act as the single point of accountability, bridging finance, IT, implementation partners, and senior stakeholders.
Ideal Candidate Overview
This role suits a pragmatic, delivery-driven ERP / Finance Project Manager with deep experience implementing finance systems in complex organisations. They will be comfortable operating at both strategic and operational levels, able to roll up their sleeves while maintaining control of governance, risk, and delivery milestones.
They will have a strong understanding of finance processes, proven experience of ERP migrations, and the confidence to challenge stakeholders where required.
Core Responsibilities
Programme & Delivery Ownership
Take full ownership of the Sage X3 implementation lifecycle: discovery, design, build, test, data migration, cutover, and post-go-live stabilisation
Develop and manage a detailed project plan, budget, resourcing model, and delivery roadmap
Own project governance, RAID logs, and reporting to senior stakeholders
Stakeholder & Partner Management
Act as the primary interface between:
Finance leadership and end users
IT and data teams
Sage X3 implementation partners and vendors
Manage third-party partners, holding them accountable for scope, quality, and timelines
Facilitate workshops and design sessions to translate business requirements into system solutions
Finance & Systems Expertise
Lead the migration from Agresso (Unit4) to Sage X3, including:
Chart of accounts redesign
Data migration and reconciliation
Reporting and consolidation impacts
Ensure system design supports:
Financial controls
Audit requirements
Regulatory and statutory reporting
Hands-On Execution
Be actively involved in:
Requirements definition
UAT planning and execution
Cutover planning and go-live readiness
Proactively identify and resolve issues rather than escalating prematurely
Change & Adoption
Support business change, user readiness, and training strategies
Ensure finance teams are confident and operationally effective post-implementation
Required Experience & Background
Essential
Proven track record delivering ERP finance system implementations as Project Manager
Direct experience implementing Sage X3
Experience replacing or migrating from Agresso / Unit4 or similar legacy finance platforms
Strong understanding of:
General ledger
AP / AR
Fixed assets
Budgeting, reporting, and financial controls
Experience managing external system integrators and vendors
Desirable
Background in finance transformation or systems roles
Experience working in multi-entity or multi-currency environments
Formal project management qualification (PRINCE2, PMP, Agile, or equivalent)
Key Skills & Competencies
Delivery-focused: Prioritises outcomes over theory
Hands-on: Comfortable operating in the detail, not just steering from above
Commercially astute: Understands cost, value, and business impact
Structured & organised: Strong planning, documentation, and reporting discipline
Resilient & assertive: Able to challenge senior stakeholders and suppliers
Clear communicator: Translates technical detail into business-friendly language
Personality & Working Style
Accountable and ownership-driven
Calm under pressure, particularly around go-live
Pragmatic problem-solver
Credible with finance leaders and technical teams alike
Success Measures
Sage X3 delivered on time, on budget, and fit for purpose
Clean data migration and successful cutover
Minimal post-go-live disruption
High user adoption and confidence within finance teams