Share this Job
Primary Location: 

USA - Herndon, VA, US

Function:  Engineering
Job Category:  Engineering

Mechanical Engineer - Thermal Management

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 more sustainable future that we can all be proud of. 


We want to transition the world towards a cleaner 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?


Wärtsilä’s Energy Business is leading the transition towards a 100% renewable energy future. As an Energy System Integrator, we understand, design, build and serve optimal power systems for future generations. Wärtsilä’s solutions provide the needed flexibility to integrate renewables and secure power system reliability. Our offering includes flexible internal combustion engine-based power plants, energy storage & integration solutions, as well as gas to power systems. We support our customers over the lifecycle or their installations with services that enable increased efficiency and guaranteed performance. Wärtsilä has 68 GW of installed power plant capacity in 177 countries around the world.


Wärtsilä’s Energy Business is looking for a Product Development Mechanical Engineer for the Energy Storage & Optimization business.


The ideal candidate will be a self-starter that can work both independently and as part of an interdisciplinary team. The candidate should thrive in a fast paced, constantly changing environment while the industry and company go through substantial growth.


Preferred location(s) for this position is Wärtsilä’s location in Herndon, VA; Houston, TX; or remote in the US.



  • Design thermal management solutions for a wide range of applications including heat load study, equipment selection, duct design, and control system.
  • Run simulations and/or perform calculations to determine thermal transfer and heat gain to determine adequacy of thermal management system configuration for given application.
  • 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.
  • Create analytical and numerical models using various CFD tools to describe system thermal performance.
  • Energy storage system auxiliary load calculation, HVAC sizing and system efficiency improvement.
  • Digital Twin development of energy storage system in Ansys software environment – ECM and thermal model generation (1D circuit or ROM).
  • 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

  • BS degree required; MS desired.
  • 3-5 years of product development and mechanical engineering experience.
  • Proficiency with Solidworks, AutoCAD, and Ansys.
  • Experience with energy storage systems.
  • 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.
  • Solving customer’s needs and issues.
  • Maintain positive working relationships with customers, peers, subordinates, vendors, shop and office in a fast paced environment.
  • Excellent communication skills.
  • Team player attitude internally and externally.
  • Entrepreneurial drive with hunter mind-set.
  • Willing to travel up to 20% of the time.
  • Location: Herndon, Virginia, USA; Houston, Texas, USA; Remote USA


Contact person to give further information:


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


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


<span style="font-family:"Times New Roman",serif"><span style="font-family:"Calibri",sans-serif">Wärtsilä North America values our employees. We offer a competitive salary and comprehensive benefits package.   Wärtsilä North America is an EOE/AA employer. 

<span style="font-family:"Times New Roman",serif"><span style="font-family:"Calibri",sans-serif">This is Wärtsilä

<span style="font-family:"Times New Roman",serif"><span style="font-family:"Calibri",sans-serif">Wärtsilä is a global leader in smart technologies and complete lifecycle solutions for the marine and energy markets. By emphasizing sustainable innovation, total efficiency and data analytics, Wärtsilä maximizes the environmental and economic performance of the vessels and power plants of its customers. In 2019, Wärtsilä’s net sales totaled EUR 5.2 billion with approximately 19,000 employees. The company has operations in over 200 locations in more than 80 countries around the world. Wärtsilä is listed on Nasdaq Helsinki. Find out more at <span style="font-family:"Calibri",sans-serif">www.wartsila.com

Nearest Major Market: Washington DC