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Kalmar, SE

Function:  Manufacturing
Job Category:  Support Functions

Assembly Leader

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.

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. Together, we can create new business opportunities and more sustainable future that we can all be proud of.  Want to join the ride?


Wärtsilä Biogas Solution - All human activity creates waste. This waste can also be a valuable resource: Excess agricultural products, manure, wastewater sludge, household and restaurant waste are perfect raw materials for biogas production. Raw biogas can be upgraded to pure biomethane, which can be compressed or liquified and used as a low carbon vehicle fuel (bioCNG or bioLNG) or injected into the natural gas grid providing renewable energy to both homes and businesses.

Wärtsilä Biogas Solutions product portfolio consists today of biogas technologies, ranging from raw biogas upgrading to biomethane for grid injection and compression, to liquefaction into bioLNG as well as the fueling infrastructure. The product portfolio is managed and optimized with annual revisions, versions and new options that is influenced by new market areas, differences in local legislations, feedstock specifications and product quality requirements. We build turn key gas treatment plants for biogas. The plants are delivered as modules to the client's installation site.

We are looking for an Assembly Leader to join our team. The preferred location for the position is in Kalmar, Sweden.

This is a permanent role.


What will you be doing 

As an assembly leader you will follow a plant from start to delivery from our factory in Kalmar. A typical lead time is 5 to 8 months.


As Assembly Leader, your work will focus on these responsibilities: 


  • Supervise internal and external resources to build the plant in our workshop, typically 4-8 persons.
  • The assembly includes include welded stainless steel pipes, valves, pumps, heat exchangers and compressors.
  • Supervising external resources for building walls, insulation and ventilation.
  • In each gas treatment plant there is also an electrical installation where you need to coordinate activities.
  • Welding of pipe supports and other parts in stainless steel that do not require a certified welder.
  • Communicate with plant manager, project manager, purchasing and engineers.
  • Contribute so that targets for cost, lead time and quality are met.
  • Improvement suggestions.


To be successful in this role we expect you to have:


  • Practical experience of assembly or maintenance of process equipment.
  • Experience in reading drawings and 3D-models.
  • Experience of managing people and projects.
  • Experience of welding stainless steel.
  • License to handle forklift and overhead crane.
  • General knowledge of computers, MRP systems.
  • Comfortable conducting improvement projects.
  • Fluent in Swedish, both in speech and writing.
  • Good understanding of English, both in speech and writing.


Why you and us 

We at Wärtsilä believe in empowerment, ownership and taking responsibility of our work. We support each other’s growth and co-creation is the true basis of our innovation. We have courage to see opportunities and take initiative.We are authentic and honest, and we strongly believe in a diverse and inclusive work community where everyone can be their true self. 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 a great team and a clear purpose to exist. We are passionate about the work we do and hope to find a colleague with a shared passion for smart technologies and a sustainable future.

All our employees are encouraged to utilize the variety of training activities, learning solutions and self-study materials that we have to offer which supports the opportunity to further develop your talents and competencies within a very global working environment, in an ambitious and growth orientated organization. 


Contact & next steps 


Does this sound like the job for you? If yes, we hope to hear from you before the application deadline, through submitting your application through our careers portal. We aim to keep you updated on the process all the way. 

Are you still wondering if you should apply and would like to get something clarified? Please reach out to Anita Olofsson Production Manager through EMAIL: with any questions related to this position (only for questions from direct job applicants, applications through email will not be recorded or responded to).


Please pay attention the position will be filled ASAP.



Last application date: 09/07/2022

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.

This is Wärtsilä

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. We emphasise innovation in sustainable technology and services to help our customers continuously improve their environmental and economic performance. Our dedicated and passionate team of 17,000 professionals in more than 200 locations in 68 countries shape the decarbonisation transformation of our industries across the globe. In 2021, Wärtsilä’s net sales totalled EUR 4.8 billion. Wärtsilä is listed on Nasdaq Helsinki. Find out more at