BESS Engineer

🔒 Confidential Employer
Posted 5 May 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Engineering
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Battery Storage Systems Design Inverters Battery Cells and Battery Management Systems HV and MV Electrical Power Systems Power System Design or Modelling Technical Communication Project Organization

FULL DESCRIPTION

BESS Engineer

[Employer hidden — view at passion-project.co.uk] is an international developer, owner, operator of renewable infrastructure. This role is for a Lead BESS Engineer to lead the design and selection of battery systems for multi-GWh energy storage projects across the UK, Spain, Italy, and Germany.

  • Department: DevCon
  • Employment Type: Permanent - Full Time
  • Location: UK - London
  • Workplace type: Fully remote

Key Responsibilities

Your mission: As Lead BESS engineer you’ll be responsible for leading the design and selection of battery systems that will be built across [Employer hidden]’s portfolio.

  • Developing conceptual designs for new battery storage systems; short-duration, long-duration and those with more advanced capabilities such as inertia, short-circuit and blackstart services.
  • Supporting the tender evaluations for new battery systems
  • Assisting the construction team with monitoring the quality of commissioning of new battery sites, including visiting of BESS suppliers for Factory Acceptance Tests
  • Leading engagement with BESS suppliers to anticipate new battery designs that will affect how we plan and develop new sites
  • Supporting the legal and contractual teams with technical expertise to understand the key contractual risks and avoid contractual disputes
  • Developing our in-house approach to long-term battery management to minimise operational risks and optimise battery health

Skills, Knowledge and Expertise

A bit about you:

  • You like the technical detail and are not afraid to get your teeth in to solving new problems with new technology
  • You’re an open, clear communicator who enjoys working collaboratively
  • You’re very organised
  • You’re enthusiastic, curious and knowledgeable about the energy storage industry

The skills you’ll need:

  • An engineering or physical science degree with at least 6 years’ experience in the energy industry
  • A deep understanding of at least one of: Inverters, Battery cells and Battery Management Systems, HV and MV Electrical power systems
  • Experience with power system design or modelling is highly desirable
  • Able to communicate complex concepts to non-technical colleagues
  • Able to communicate effectively with contractors and suppliers from around the world.
  • Willingness to occasionally travel to sites in the UK, Germany, Italy and Spain and battery equipment suppliers in Europe and China

Benefits

  • Enhanced parental leave: 6 months fully paid primary carer leave, 3 months fully paid secondary carer leave, 10 days fully paid leave for fertility treatment
  • Up to 10% company wide bonus
  • Private medical cover with Bupa from day one
  • Hybrid working (blend of home and office)
  • Nest pension (8% combined contributions)
  • 25 days holiday + bank holidays
  • £2,000 annual learning & development budget
  • 1 month a year ‘work from anywhere in the world’ policy
  • Mental health benefit with Spill
  • Green leave: paid time off to do something good for the environment
  • Fun co-working office space in Shoreditch, London or Berlin, Germany
  • Dog friendly office
  • Free team lunch once a week
  • Regular team socials
  • Birthday carbon offset

About [Employer hidden]

To reach Net Zero, we need to solve big challenges. [Employer hidden] will fund, build and run the renewable infrastructure we need to tackle these challenges. At [Employer hidden], we will show that batteries are a totally viable part of our energy infrastructure - now, not in some distant future. We have ambitious plans to become the defining new clean energy player in Europe over the next few years.

Our Values

  • Move fast - We’re finishers. Doers. Pragmatists.
  • Know your stuff - We’re curious and pride ourselves on always learning.
  • Do it right - We do things the right way and never cut corners.
  • Work for the team - We are friendly and approachable.
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