Location: Madrid or Seville, ES; Genoa, IT

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Job Reference: 15150

Overview of the Role

Battery Energy Storage Systems (BESS) Engineer – responsible for leading the design, development, implementation and operation of BESS in renewable energy projects, primarily wind and solar power. Acts as the Owner’s Engineer, ensuring seamless integration of BESS into project execution and providing technical expertise to clients, stakeholders and senior management.

Key Responsibilities

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- Provide comprehensive engineering support throughout the lifecycle of BESS projects, ensuring adherence to technical specifications, contract management and stakeholder coordination.

- Conduct thorough feasibility studies, including technical and economic viability assessments, site evaluations and identification of potential risks and mitigation measures.

- Offer expert guidance on energy storage systems, renewable energy integration and project development strategies to clients, energy majors, utilities and governments.

- Stay updated on the latest advancements in BESS technologies, industry trends and regulatory requirements; share technical knowledge within the organization.

- Assess project specifications, energy storage needs and grid requirements to propose optimal BESS configurations.

- Assess the technical capabilities and reliability of potential BESS suppliers, ensuring adherence to project specifications and quality standards.

- Collaborate with procurement teams to define technical specifications, evaluate bids and select suitable equipment and technologies.

- Evaluate electrical system design, protection schemes and interconnection requirements for BESS integration, including grid stabilisation and backup power.





- Perform simulations and modelling to predict system performance and optimise design.

- Define KPIs and implement data acquisition systems to monitor BESS performance, including energy storage efficiency, response times and system availability.

- Analyse performance data to identify trends, assess health of the BESS system and recommend maintenance or operational improvements.

- Develop project schedules, budgets and resource plans for successful BESS implementation.

- Collaborate with project teams to manage risks, resolve technical issues and ensure compliance with project milestones.

- Perform on‑site inspections to ensure quality and integrity of BESS components, installations and interconnections.

- Develop and implement quality control plans, inspection checklists and acceptance criteria for BESS systems.

- Collaborate with commissioning teams to define test protocols and procedures, ensuring thorough verification of system performance and functionality during commissioning and testing.

Candidate Specification

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- Bachelor’s degree in engineering – preferably electrical/electronic engineering, renewable energy or energy storage systems. A master’s degree or relevant certifications would be advantageous.

- Prior 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 related to energy storage, renewable energy and grid integration.

- Excellent written and oral communication skills in English; additional languages are an asset.

Benefits

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- Competitive annual leave

- Pension scheme

- Life insurance

- Annual professional institution subscription

- Private medical insurance

- Optional benefits via salary sacrifice (restaurant voucher, transport card, day care voucher)

- Continuous development opportunities

- Agile/adaptable working arrangements

- Annual bonus scheme

- Wellbeing support (independent Employer Assistance Scheme, wellbeing champions, learning and support resources)

- Access to Advanced Employee Networks supporting LGBTQ+, gender, race, ethnicity, disability and parent/carer communities

- Opportunity to make a difference and contribute to social outcomes

Equality, Diversity and Inclusion

We put equality, diversity and inclusion at the heart of our business, and we seek to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they can contribute. xqbhyrx

Accessibility

We want you to perform your best at every stage in the recruitment process. If you are disabled or need any support to enable you to apply or attend an interview, please contact us at and we will discuss how we can support you.

Contract Details

Contract Type: Permanent
Work Pattern: Full Time
Market: Energy
Discipline: Electrical

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📌 Senior / Principal BESS Engineer - Renewables (Sevilla)
🏢 Mott MacDonald
📍 Sevilla