Site Engineer - BESS & Power Plant Support

Wärtsilä Energy leads the transition towards a 100% renewable energy future. We help our partners to accelerate their decarbonisation journeys through our market-leading technologies and power system modelling expertise. These cover decarbonisation services, future-fuel enabled balancing power plants, hybrid solutions, energy storage and optimisation technology, including the GEMS Digital Energy Platform.

Did you know Wärtsilä has delivered 79 GW of power plant capacity and more than 130 energy storage installations in 180 countries around the world?

In this fast changing world of energy, we are constantly on the lookout for future-oriented talent to join our team and to work towards enabling sustainable societies through innovation in technology and services - together. Want to join the ride?

Senior Service Engineer – Site Engineer - BESS & Power Plant Support, Energy Business

The Wärtsilä Energy Business – St. Thomas, USVI team has a vacancy for a Site Engineer – BESS & Power Plant Support.

Position Overview:

We are seeking a technically skilled and adaptable Site Engineer to support the daily operations and light maintenance of a Wärtsilä GridSolv Max battery energy storage system (BESS), while also providing secondary support to co-located Wärtsilä 32 and 34 engine-based power plants. This position is ideal for a candidate with a strong foundation in electrical systems and a willingness to contribute across both renewable and thermal energy platforms.

Primary Responsibilities – GridSolv Max BESS:

• System Monitoring & Inspections:
• Conduct daily walkdowns and visual inspections of GridSolv Max containers.
• Monitor system performance using SCADA and BMS platforms.
• Identify and report system anomalies or alarms.
• Preventive & Light Maintenance:
• Perform and schedule routine maintenance on HVAC units, fire suppression systems, and power distribution panels.
• Replace fuses, inspect battery racks, and ensure all safety systems are operational.
• Troubleshooting & Coordination:
• Respond to minor faults and coordinate with OEM support for escalated issues.
• Assist with firmware updates and system resets as needed.
• Collaborate with utility personnel and contractors during site activities.
• Documentation & Compliance:
• Maintain accurate logs of inspections, maintenance, and system events.
• Ensure compliance with UL9540 and site-specific safety protocols.

Secondary Responsibilities – Wärtsilä Engine Power Plant Support:

• Assist plant technicians with routine inspections and operational checks on Wärtsilä 32 and 34 engines.
• Support troubleshooting of auxiliary systems and gensets.
• Participate in scheduled maintenance activities.
• Monitor engine performance data and report deviations to the plant operations team.
• Ensure coordination between BESS and engine operations during load transitions or grid events.

Qualifications:

• Associate’s or Bachelor’s degree in Electrical, Mechanical, or Energy Engineering.
• Minimum 2 years of experience in energy storage, power generation, or industrial electrical systems.
• Familiarity with containerized BESS, especially Wärtsilä GridSolv Max.
• Basic understanding of reciprocating engine systems and plant operations.

Last application date: 15/08/2025 

Why you and us

You will be a part of a global organization with local presence and work in an exciting and dynamic working environment with highly motivated and skilled co-workers. We offer interesting and challenging work tasks, as well as personal and professional development in a great team. If you feel excited by being a part of this working environment and think your personal skills and qualities match the job requirements, we look forward to receiving your job application.

Successful applicant must be authorized to work in the USA without sponsorship.

We look forward to hearing from you. Qualified candidates must apply online: https://www.wartsila.com/careers

Individuals hired for positions that require on-site customer interactions and/or in-person travel may be required to be fully vaccinated against COVID-19 or other country-specific vaccinations, unless otherwise prohibited by law. Wärtsilä North America values our employees. We offer a competitive salary and comprehensive benefits package. Wärtsilä North America is an EOE/AA employer. 

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.