UK Change Manager

Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.

Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.

As UK Change Manager, you will deploy the global change roadmap locally, ensuring it is adapted to the UK context, stakeholders and operational realities.

Please note this role is initially offered on a 2 year fixed term contract.

Responsibilities

Rolling out the UK change roadmap aligned with the global ERP programme, adapting it to local populations, constraints and timelines; Leading local scoping activities : stakeholder mapping, impact assessments (processes, roles, pain points, risk of workarounds) and continuous updates; Activating UK sponsorship by preparing and supporting the UK Sponsor and management chain (manager toolkits, key messages, Q&A, team briefings); Driving adoption measurement and reporting through ADKAR/ICAP pulses, gap analysis (Awareness, Desire, Knowledge, Ability, Reinforcement) and corrective action plans, with reporting consolidation for France; Building and animating the UK Key Users / Super Users network (selection, onboarding, rituals, recognition, coordination with business teams); Coordinating operational readiness : role-based training plans, session organisation, completion tracking, UAT preparation “as in real life”, and structured feedback management; Preparing and supporting Go-Live (D-90 / D-30 readiness checkpoints), providing hands-on support, managing resistance, and running a clear “what we heard / what we changed” loop; Managing Hypercare and stabilisation (D+30 / D+60 / D+90) : field support, reduction of irritants, securing adoption and smooth transition to BAU/Run

Requirements

Master’s degree (or equivalent) in Business, Engineering or a related field.; Proven experience in change management within ERP or large-scale transformation programmes, with direct SAP implementation experience essential .; Workday implementation experience, particularly Workday HCM, would be highly beneficial.; Strong command of change management methodologies and tools, including stakeholder mapping, impact analysis, sponsorship activation, change networks, training strategy and adoption measurement (e.g. ADKAR).; Strong influencing and facilitation skills, with the confidence to challenge senior stakeholders, navigate difficult decisions and drive engagement without direct authority .; Comfortable working in a complex, international and cross-functional environment, with an understanding of global/local decision-making, integration, data and governance considerations .; French language skills are an advantage, enabling effective collaboration with the France-based project team