The Senior Planner is responsible for developing, maintaining, and controlling integrated project schedules for large-scale power transmission projects, including substations, overhead lines (OHL), underground cables, and grid infrastructure.
The role ensures accurate planning, progress monitoring, forecasting, and schedule risk analysis to support safe, timely, and cost-effective delivery of complex transmission programmes.
Key Responsibilities
1. Schedule Development & Integration
Develop and maintain detailed Level 3–5 schedules for transmission projects.
Build logic-linked, resource-loaded programmes using Primavera P6 or equivalent.
Integrate engineering, procurement, construction, commissioning, and outage plans.
Ensure alignment with regulatory milestones and client requirements.
2. Planning Governance & Controls
Apply structured planning standards and WBS development.
Ensure compliance with NEC, FIDIC, or equivalent contract planning requirements.
Maintain baseline control and change management processes.
Support stage-gate reviews and assurance processes.
3. Progress & Performance Management
Lead monthly update cycles including progress validation and critical path analysis.
Identify schedule risks, float erosion, and constraint impacts.
Produce earned value metrics (SPI, CPI where applicable).
Provide early warning and mitigation recommendations.
4. Risk & Scenario Analysis
Conduct schedule risk analysis (e.g., Monte Carlo simulations).
Develop what-if scenarios and recovery programmes.
Analyse outage windows, access constraints, and seasonal impacts.
Support delay analysis and claims preparation where required.
5. Stakeholder Engagement
Collaborate with project managers, engineers, commercial teams, and site management.
Present schedule performance at governance forums.
Interface with client planning teams and regulatory stakeholders.
Support supply chain schedule integration.
6. Reporting & Data Analytics
Produce dashboard reports and executive summaries.
Provide 4D planning input where applicable.
Use digital planning tools and data analytics to enhance forecasting.
Maintain schedule data integrity across portfolio systems.
Project Environment Experience (Essential)
High-voltage transmission (132kV–400kV+)
Overhead line construction and refurbishment
Substation build and extension works (AIS / GIS)
Underground cable installation
Grid connection projects
National grid / utility framework environments
Benefits include:
- Pension scheme (8% company contribution / 4% personal contribution)
- 25 days’ paid annual leave + bank holidays + option to buy or sell days
- Professional fees reimbursed
- Flexible working
- Employee referral scheme
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.
Top Skills
What We Do
Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition. We see ourselves as an activist in the development of nuclear energy, convinced that it is an essential part of the fight against climate change. 7,000 switchers, spread in 12 countries in Europe, Asia, Africa and the Middle East are working every day to make the energy switch by accelerating the development of nuclear and renewable energies, power grids, clean hydrogen projects and low-carbon transport. We design and supervise major projects through our engineering activities and accelerate our customers' digital transformation. We also develop new solutions to build faster and improve the performance of complex infrastructures. 55 years of experience have made Assystem a key partner of the world's largest industrial groups: CEA, EDF, ENEC, Enedis, Engie, Framatome, ITER, K.A. CARE, Naval Group, NICDC, Orano, RATP, Rolls Royce, Royal Commission, Sellafield, SGP, SNCF... Assystem is ranked in the Top 3 companies in the nuclear energy sector.
