Wärtsilä Energy Storage is powering the shift to a cleaner, more resilient grid.
We work at the front lines of the energy transition, helping partners around the world maximize the value of renewables through grid-scale battery systems, advanced software, and expert services. Our portfolio includes the industry-leading GEMS Digital Energy Platform, utility-scale battery solutions, and lifecycle services that keep storage assets optimized and ready when it matters most.
With over 17 GWh of storage deployed or under contract across 130+ projects globally, we're shaping how the grid of the future works.
In a world of rising complexity and accelerating change, we're looking for future-focused talent to help us design, deliver, and support the energy systems of tomorrow.
Sound like your kind of challenge? Let's build it together.
The position of Systems Engineer ("SE") will be part of the growing Project Delivery Team and report to Manager of Project Delivery. We require two individuals to support current commerical activity. An ideal location for us is eitehr the UK or Finland.
The SE are responsible to oversee the Project Design (Electrical Design Package, Communication, and minor Software), Commissioning, and Technical Support of AC and DC electrical systems associated with utility-scale Battery Energy Storage Systems (BESS). Applicant should have a solid understanding of fundamental electrical engineering, project management and construction principals, as well as experience designing high power electrical systems.
This position will be a member of Wartsila's internal and customer technical Subject Matter Expert Team for ESS Products and Projects and will work closely with the following group: Software Delivery, Product Delivery, Project Management, Commissioning Manager, and other various groups to ensure ESS projects fulfil customer functionality and contract requirements.
Minimum Skills Requirements:
- Minimum Bachelors or Master's degree in Electrical, Mechanical or Power Engineering, or equivalent work experience
- 3 years of experience with renewable energy with distribution or transmission level Energy Storage System
Job Specific Responsibilities:
- Collaborates in a cross functional environment, leading the technical team in a project focused engineering effort.
- Establish and maintain the engineering, design criteria and applicable standards and specifications for the Energy Storage System (ESS) project.
- Interface with external product vendors to understand the specification(s) and function(s) of their product(s) and service(s).
- Specify appropriate system components, calculate component ratings and quantities, and create detailed bills-of material for energy storage projects.
- Review detailed electrical plans produced by others and provide precise organized feedback in a timely manner.
- Review project technical specifications and provide feedback to ensure that project requirements will be met.
- Perform site visits and ESS field inspection in advance to check any risks from engineering side.
- Tier 2 project technical support for internal and external stakeholders.
- Ability to travel to domestic and international project sites and/or vendors (Approx. 10 - 15%).
Additional Job Requirements:
- Experience and knowledge with lithium-ion battery systems.
- Experience of UK, Belgian, China markets.
- Familiar with relevant codes and standards for ESS and inverters (NEC, IBC, IFC, NFPA, UL, IEC).
- Experience with grid compliance process and testing (e.g., UK / ENTSO).
- Ability to use energy management systems to operate, troubleshoot and commission battery systems.
- Excellent verbal and written communication skills, including ability to effectively communicate highly complex engineering, construction, and operational issues.
- Fluency in English is mandatory and additional Language Skills including Flemmish and or Chinese dialects are of high importance and advantageous.
- Experience with utility scale energy storage and renewable energy projects and products (bi-directional inverters, various battery chemistries, PV, wind turbines, flywheels, etc.).
- Understanding of Inverter, Converter, Transformer, Battery, Circuit breaker, Fuse, AC/DC power supply electrical equipment.
- Applicant should be able to explain in detail the electrical principals of voltage, current, real and reactive power, energy, charge, AC/DC voltage, single-phase, and three-phase power, and other fundamental electrical engineering concepts.
- Applicant should be able to read and understand drawings of electrical controls. Especially single-line, three-line, fire safety systems, and communication diagrams.
- An understanding of power quality analysis, harmonics, and their impact on system stability.
- Experience with industrial control methods and SCADA systems.
Contact & next steps:
Please submit your application through our Careers portal. Applications submitted via email will not be considered.
After submitting your application, you will receive a confirmation email.
For further questions please reach out to Jason Crouch, Talent Partner, Global Talent Segment, through email [email protected] with any questions related to this position (only for questions from direct job applicants, applications through email will not be recorded or responded to and we have no need of agency partner support on this role).
Last application date: 29/03/2026
At Wärtsilä we value, respect and embrace all our differences, and are committed to diversity, inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job-relevant merits and abilities.
Please note that according to Wärtsilä policy, voluntary consent for a security check may be required from candidates being considered for this position, depending on the applicable country.
This is Wärtsilä
Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18,300 professionals, in more than 230 locations in 77 countries, shape the decarbonisation transformation of our industries across the globe. Read more on www.wartsila.com.
#WärtsiläEnergyStorage