Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 8,000+ switchers located in 14 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy. We are a collective committed to making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition.

Here is how you can be a part of that switch:

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

Your responsibilities will include:

• 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

• Master’s degree (or equivalent) in Business, Engineering or a related field.

• Proven experience in change management, ideally within ERP or large-scale transformation programmes.

• 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).

• Comfortable working in an international, cross-functional environment, collaborating with diverse stakeholders across functions and geographies.

• Strong influencing and facilitation skills, with the ability to lead workshops, support managers and drive engagement without direct authority.

• French language skills are an advantage, enabling effective collaboration with the France-based project team.

Diversity & Inclusion

We are committed to equal treatment of candidates and foster all forms of diversity within our company. Bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and the ability to dare are what matter most. Bring your unique contributions and help us shape the future.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.