Senior / Principal BESS Engineer – Renewables

Mott MacDonald is recruiting a Senior / Principal BESS Engineer for its Energy business unit to support the integration of battery energy storage systems into wind and solar projects internationally. The permanent role carries Owner’s Engineer responsibility, so the successful candidate leads technical delivery from feasibility through design, implementation, commissioning and operation. The Energy unit serves clients across hydropower, nuclear, waste, renewable generation and transmission and distribution networks, and the role offers career development that includes exposure to other power generation technologies, mainly renewable energy projects. Mott MacDonald is employee owned, and senior roles have a direct pathway towards ownership from day one. The package includes employer pension matching between 4.5% and 7%, annual bonus schemes, private medical insurance for UK colleagues, and a minimum of 33 to 35 days holiday depending on level.

Key Responsibilities

• Provide engineering support across the full lifecycle of BESS projects, covering technical specifications, contract management and stakeholder coordination
• Run feasibility studies that combine technical and economic viability assessment, site evaluation, and risk identification with mitigation measures
• Advise clients, energy majors, utilities and governments on energy storage systems, renewable energy integration and project development strategy
• Assess project specifications, storage needs and grid requirements to propose the best BESS configurations
• Assess the technical capability and reliability of potential BESS suppliers, and work with procurement teams to define technical specifications, evaluate bids and select equipment and technologies
• Evaluate electrical system design, protection schemes and interconnection requirements, including grid stabilisation and backup power
• Perform simulation and modelling to predict system performance and optimise design
• Define KPIs and data acquisition systems to monitor storage efficiency, response times and system availability, then analyse performance data to assess system health and recommend maintenance or operational improvements
• Develop project schedules, budgets and resource plans, and manage risks and technical issues with project teams
• Perform on-site inspections of BESS components, installations and interconnections, and develop quality control plans, inspection checklists and acceptance criteria
• Work with commissioning teams to define test protocols and verify system performance and functionality during commissioning and testing
• Keep pace with BESS technology, industry trends and regulatory requirements, and share that knowledge across the organisation

Requirements

Essential:

• Bachelor’s degree in engineering, preferably electrical or electronic engineering, renewable energy or energy storage systems
• Experience in technical due diligence, owner’s engineering, advisory services and feasibility studies for renewable energy projects and/or energy storage systems
• Strong knowledge of BESS technologies, grid integration and power system modelling
• Project management skills, including risk management and coordination with diverse teams
• Familiarity with local and international regulations, industry standards and codes covering energy storage, renewable energy and grid integration
• Excellent written and spoken English for working with technical and non-technical colleagues and clients, with other languages an asset

Desirable:

• Master’s degree or relevant certifications in a related field

Mott MacDonald Ltd is not currently offering Skilled Worker visa sponsorship for this role. Applications are welcome from candidates eligible for other UK immigration routes that need no sponsorship now or in future.