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