(Senior) Sales Engineer

Wärtsilä is an innovative technology company known for being a forerunner in the Marine and Energy markets. Every day, we – Wärtsilians – put our hearts and minds into turning Wärtsilä's purpose of enabling sustainable societies through innovation in technology and services into reality. Our ultimate aim is to provide increased value to both our customers and society. New, game-changing ideas and continuous improvement have been part of our DNA since 1834. Together, we can create new business opportunities and more sustainable future that we can all be proud of.

We want to transition the world towards a decarbonised and sustainable future. By pushing the boundaries of engineering and technology, we can make it work. We are always on the lookout for future-oriented talent – want to join the ride?

We are looking for a (Senior) Sales Engineer with a main responsibility in energy storage. This is a permanent role, and the preferred location for this position is Vaasa, Finland, but other Wärtsilä locations in Finland are also negotiable. We offer the possibility to work in a hybrid model.

Your role and responsibilities

As a Sales Engineer, you will be the subject matter expert for Wärtsilä Energy Storage in the Europe and Africa regions, with expertise in the technical design of systems and the identification of business models that support the economic case for deploying energy storage.

The ideal candidate has a BSc or MSc degree in Electrical Engineering / Power Engineering and experience with the energy storage and renewable energy markets. The final scope and seniority of the role will be tailored to match the experience and competencies of the selected candidate. You’ll be working as part of an energetic sales engineering team with diverse expertise.

Your work will focus on these responsibilities:

• Work closely with the sales team to help identify and engage with key customers/accounts within the area, and support and maintain relationships related to Energy Storage
• Manage the RFP response process, including determining bidding strategy and partner selection, and work together with such partners to submit winning responses and draft the actual proposal
• Lead proposal creation for Energy Storage projects
• Write proposal content to meet specific customer requirements and highlight the unique value points of the integrated solution
• Specify appropriate system components, calculate component ratings and quantities, and create detailed bills of material for material and labor cost estimates
• Interface with vendors to understand the form, fit, and function of their products and services, and determine which products are best suited for an application or project
• Utilize value concepts and tools to define the right value solutions for each individual customer
• Help further develop Sales Tools for Energy Storage

To be able to succeed in the position, we expect you to have:

• A BSc or MSc degree in Electrical Engineering / Power Engineering, or equivalent work experience
• Experience in energy storage and renewable energy markets, including familiarity with related projects and technologies (e.g., bi-directional inverters, battery chemistries, PV systems, wind turbines, flywheels, etc.)
• Ability to read and interpret system schematics, single-line diagrams, and layout drawings
• Strong written and verbal English communication skills, with a proven ability to produce clear, well-structured technical proposal documents and present solutions effectively to customers
• Proficiency in AutoCAD or equivalent drafting tools
• Knowledge of utility systems and grid interconnection requirements for electric generators
• A passion for innovation and the ability to adapt to fast-changing market demands, working both independently and as part of a team
• A proactive, ownership-driven mindset with a focus on delivering results
• Strong organizational skills, including attention to detail, the ability to multitask, and a solid work ethic
• An energetic and enthusiastic approach to work
• Willingness to travel as required (approximately 10–20% of the time)

Why you and us?

We at Wärtsilä believe in empowerment, ownership, and taking responsibility for our work. We support each other’s growth, and co-creation is the true basis of our innovation. We have the courage to see opportunities and take initiative.

We are authentic and honest, and we strongly believe that by being your true self, you can accomplish so much more. We don’t always get it right the first time, and if mistakes are made, we make sure to learn and grow from them. We want everyone to voice their opinions freely. That is why we have built an environment that empowers you and everyone around you, and where you can feel safe and cared for. Are you eager to be part of this ambition?

We have an amazing team, and we are excited about our work and the impact it has on building sustainable societies. We are looking to find a colleague with this shared passion for smart technologies and a sustainable future.

Contact & next steps

We hope to hear from you soon by submitting your application through our Careers portal. We aim to keep you updated throughout the process.

For further questions, please reach out to Johan Öst, General Manager Sales Engineering, at johan.ost@wartsila.com (only for questions from direct job applicants; applications via email will not be recorded or responded to). Johan is available for inquiries via email preferably until 1 July.

Welcome to join us in shaping the decarbonisation of marine and energy!

Last application date: 31/07/2026

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.

All new Wärtsilä employees in Finland will attend occupational health checks, including drug tests/screenings where applicable. When a person is located outside of Finland, the country legislation is followed.

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.