Senior Mechanical Engineer

Number of employees

Houston, TX

Posted on: 2026-04-29

Category: transportation

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Employment type:

Full time

Experience required:

Senior

Salary

Salary not provided

About the company:

Fleetzero is a marine energy and robotics company focused on decarbonizing the global shipping industry through advanced battery technology and electric propulsion systems. Founded in 2021, the company develops the Leviathan Modular Energy Storage System, a marine battery platform engineered to deliver high energy density at costs competitive with fossil fuel alternatives. Their flagship marine battery container stores 3.8 MWh of energy in a footprint 25% the size of a standard shipping container, and the system is designed to scale from small support vessels to large ocean-going ships, including missions capable of crossing the Pacific Ocean on a single charge.

Senior Mechanical Engineer

Own mechanical R&D for Fleetzero battery modules: From a clean-sheet concept through production-ready design.

ABOUT THE ROLE

You will be the driving force behind the full mechanical development lifecycle of our battery module products. That means owning designs from initial concept and first-article prototypes, through development testing, design validation, and into high-volume manufacturing. You will work closely with electrical, manufacturing, and systems engineering counterparts to deliver robust, producible hardware on aggressive schedules.

This is a hands-on role. You will be building and testing prototypes yourself, running experiments, and iterating quickly. If you are the type of engineer who is equally comfortable at a CAD workstation and a build bench,  this role is for you.

BONUS POINTS

  • Experience with battery systems, power electronics enclosures, or thermal management for high-energy-density products
  • Background in marine, defense, automotive, or industrial equipment markets
  • Familiarity with IP-rated enclosure design and sealing strategies
  • Experience with liquid cooling systems design and qualification

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