Interim Systems Integration Manager

Role: Interim Systems Integration Manager Type: Contract - Outside IR35 Location: Hybrid (London + UK Travel)

The Opportunity

An ambitious, acquisitive professional services group is undertaking a major business systems transformation programme across multiple operating companies.

We are looking for an experienced Interim Systems Integration Manager to lead the implementation, integration and rollout of a new technology stack, ensuring systems, data and processes are aligned across the group.

This is a hands-on transformation role, combining programme leadership, process design, systems integration and stakeholder management. You'll be responsible for creating a scalable operating model that supports future growth and acquisitions.

Key Systems - The programme includes the implementation and integration of:

• Sage Intacct (ERP)
• HubSpot (CRM)
• Employment Hero (HRIS)
• Scoro (Project Management, Resource Planning & Time Recording)

Key Responsibilities

* Systems Design & Architecture

• Map current business processes and data flows across multiple operating companies.
• Design the future-state systems architecture and operating model.
• Define system ownership and master data structures.
• Remove manual processes, duplicate data entry and spreadsheet-driven workarounds.
• Ensure data flows seamlessly across all platforms.

Systems Integration

• Lead the integration of ERP, CRM, HR and project operations systems.
• Define integration requirements and oversee delivery with implementation partners.
• Ensure alignment of customer, employee, project and financial data across platforms.
• Support data migration, testing and user acceptance activities.
• Create scalable integration standards for future acquisitions.

Programme Delivery

• Develop and manage project plans, milestones and delivery roadmaps.
• Coordinate internal stakeholders, software vendors and third-party partners.
• Manage risks, dependencies and delivery timelines.
• Drive accountability across multiple workstreams and business units.
• Provide regular progress updates to senior leadership.

Business Transformation

• Facilitate process mapping and discovery workshops.
• Challenge existing ways of working and identify opportunities for improvement.
• Standardise processes across multiple businesses.
• Support change management, adoption and user engagement.
• Build a repeatable implementation playbook for future growth initiatives.

Reporting & Data Visibility

• Ensure systems support real-time business reporting and operational visibility.
• Enable reporting across project profitability, utilisation, WIP, resource planning and financial performance.
• Work closely with business leaders to ensure reporting requirements are embedded within the solution design.

Skills & Experience

Essential

• Proven experience delivering complex systems integration or transformation programmes.
• Strong background in ERP, CRM, HRIS or professional services systems implementation.
• Experience working within multi-site or multi-entity organisations.
• Excellent stakeholder management skills, including engagement with senior leadership teams.
• Strong process mapping and business analysis capability.
• Experience managing software vendors and implementation partners.
• Ability to work autonomously and drive outcomes in a fast-paced environment.

Desirable

• Sage Intacct implementation experience.
• HubSpot implementation experience.
• Employment Hero knowledge.
• Experience with Scoro or similar PSA/project accounting platforms.
• Exposure to M&A integration programmes.
• Experience within private equity-backed organisations.
• Background working within professional services, consulting, engineering or project-based businesses.

Contract Details

• Initial 4-month contract
• Outside IR35
• Hybrid working model
• London-based meetings when required
• Travel to UK operating businesses as needed
• Immediate start preferred