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Herndon, VA, US

Function:  Engineering
Job Category:  Engineering

Internship- Thermal 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 with smart technology, and our Smart Marine and Energy visions 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 a more sustainable future that we can all be proud of.

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


Main Responsibilities:

  • Design thermal management solutions for a wide range of applications including heat load study, equipment selection, supplier management
  • Run simulations and/or perform calculations to determine thermal transfer and heat gain to improve thermal management
  • Manage suppliers and projects to ensure timely program deliverables within budget
  • Demonstrable motivation and ability to solve novel, difficult design problems with tight timing constraints
  • Develop various battery cell test experiments, document procedures, and preform the tests in a lab environment
  • Conduct CFD analysis using Ansys Fluent to investigate innovative thermal cooling solutions for battery systems
  • Energy storage system auxiliary load calculation, HVAC sizing and system efficiency improvement
  • Design mechanical enclosures, racks, parts, and/or features intended to be used in the energy storage industry
  • Design mechanical features of battery module packs
  • Develop and document test procedures, assembly and installation instructions, and other document and system documentation
  • Collaborate in a team environment and/or take charge of opportunities to develop optimal solutions for customers and development programs
  • Support manufacturing and system deployment activities by collaborating to resolve issues and ensure products and systems are delivered to specification.


Minimum Experience and Educational Requirements:


  • MS degree required, PHD desired
  • Experience with Solid works, Inventor, AutoCAD, and Ansys
  • Experience with energy storage systems in preferred
  • Knowledge of manufacturing process and techniques (forming, machining, welding and inspection/testing) used in the manufacture of fabricated metal parts a plus
  • Knowledge of heat transfer and thermodynamics


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:


Wärtsilä North America values our employees. We offer a competitive salary and comprehensive benefits package.   Wärtsilä North America is an EOE/AA employer.


Vaccination is a vital tool to reduce the presence and severity of COVID-19 cases in the workplace, in communities, and in the nation as a whole. The spread of COVID when working in customer facilities and project sites can lead to costly site shutdowns, for which Wärtsilä could be deemed financially responsible. Many local government authorities require proof of vaccination to enter the state or country, and many of our customers require proof of vaccination to be on a project site. In line with legal regulations Wärtsilä has implemented a COVID-19 policy on vaccination and testing to reduce the risk of transmission on Wärtsilä premises. Wärtsilä strongly encourages all employees to be vaccinated to protect themselves and other employees.


Nearest Major Market: Washington DC