Mechanical Engineer

Engineering · Boston, Massachusetts
Department Engineering
Employment Type Full-Time
Minimum Experience Mid-level

Mechanical Engineer 

About XL Fleet:

XL Fleet is an exciting, high-growth hybrid vehicle technology company founded by MIT alumni. We have developed cutting-edge technology to convert conventional commercial vehicles into hybrids to reduce fuel consumption and to generate a compelling return on investment for fleet customers. We are an ambitious and small (but rapidly growing) team, and our state-of-the-art engineering facility is based in Boston. We are looking for high-energy, creative, and ambitious people to join our development team. Candidates must be located/willing to relocate to Boston area.

We offer a competitive salary, meaningful stock ownership, 401K, health benefits, a fun work environment and the opportunity to enter a high-growth startup company. We recruit candidates who have demonstrated leadership and excellence throughout their careers and are excited by the prospect of tackling challenging technical problems.

XL Fleet seeks an experienced mechanical engineer to perform design, development, and production support of mechanical powertrain components and systems for commercial hybrid electric vehicles. This person will be a core technical contributor of the Engineering team at XL.


  • Design & develop packaging of mechanical components for commercial hybrid electric vehicles including:
    • Custom frame cross members
    • Mounting brackets for traction motors, inverters, battery packs & auxiliary components (pumps, reservoirs, radiators and microcomputers)
    • Develop & test routing for cooling hoses, high voltage, and low voltage wiring
    • Develop, prototype & integrate custom drive shaft components (spline shafts, u-joints, tube shafts, slip yokes, bearings, boots)
  • Support development of custom core components (batteries/inverters/motors/chargers etc.)
  • Extract CAD of full vehicle models from OEMs to design/package added hybrid components
  • Support sustaining engineering by assessing model year variations and updating components/BOMs
  • Perform integration of mechanical systems into prototype vehicles and subsequent road test driving to verify designs for production
  • Adapt products to new vehicle platforms driving for commonality and modularity
  • Perform mechanical and thermal analysis and develop models to predict component and system behavior
  • Support testing to validate component and subsystem designs off road & on road tests including management of subcontracted efforts such as full vehicle crash testing and component design validation
  • Work with Sr. Engineers to transition designs to production & support production launch of components
  • Interface with manufacturers & incorporate design for manufacturability concepts into prototypes & production components
  • Develop and manage prototype component suppliers including quoting and ordering
  • Support configuration control of the hybrid system bill of materials
  • Support development of installation and maintenance instructions

Candidate will report to the Sr. Mechanical Engineer & work closely with other project engineers

Minimum Qualifications

  • B.S. in Mechanical Engineering with minimum 3 years of relevant industry experience
  • Proficient in SolidWorks solid model CAD, file management, and engineering drawing release
  • Demonstrated experience taking products from concept to production release
  • Must be able to work full time in XL Hybrids’ Boston office
  • Hands-on aptitude and willingness to work on vehicles in the shop/lab areas
  • Willingness to travel,  <10% of time

Preferred Qualifications

  • Prior experience in automotive engineering including hybrid vehicle development experience
  • Direct automotive design or technician experience
  • Previous powertrain work experience for a major vehicle OEM
  • Proficient in structural, vibration, thermal analysis, finite element and/or CFD tools

Thank You

Your application was submitted successfully.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

  • Location
    Boston, Massachusetts
  • Department
  • Employment Type
  • Minimum Experience