---
title: 'Staff Mechanical Design Engineer, Thermal Systems at Formenergy'
canonical: 'https://feeny.ai/job/staff-mechanical-design-engineer-thermal-systems-formenergy-berkeley-7xr15gw7b8tj'
type: 'job'
last_seen: '2026-09-11'
---

# Staff Mechanical Design Engineer, Thermal Systems at Formenergy

- **Company:** [Formenergy](https://feeny.ai/companies/formenergy)
- **Location:** Berkeley, CA
- **Compensation:** $148k–$194k
- **Employment:** full-time
- **Posted:** 2026-05-15
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/formenergy/1235ba3b-566f-4597-8cbb-d4dd95cd1f7a/application

**Skills:** Mechanical design, Thermal management systems, Fluids modeling, Thermodynamic systems, Analytical modeling, Prototyping, Manufacturing design

> Lead the design, prototyping, and testing of thermal management systems for utility-scale iron-air battery storage. Own subsystem architecture, analytical modeling, and vendor engagements while mentoring junior engineers and optimizing designs for high-volume manufacturing.

## Job description

Are you ready to build America’s energy future? Form Energy is an American manufacturing and energy technology company. We’re revolutionizing energy storage with cost-effective, multi-day technology designed to keep the electric grid secure and reliable, even during extended periods of stress. By strengthening the electric system and reimagining what’s possible, we’re giving clean energy a whole new form!

In recent years, Form Energy has earned a number of accolades, including being named by TIME as a “Best Invention”, MIT Technology Review as a “Top Climate Tech Company To Watch”, and Fast Company as “One of the Next Big Things In Tech”. We are making rapid progress on our mission of delivering energy storage for a better world, and our team is growing just as rapidly to meet demand. We have signed contracts with leading electric utilities across the United States and production of our iron-air batteries is underway at our first high-volume manufacturing facility in West Virginia.

Working for Form Energy is more than just a job, it’s a chance to be part of something extraordinary. And now - right as we significantly scale up battery manufacturing -  might be the most exciting moment in the company’s history to join. We are assembling a team of highly talented and driven individuals across the country. Driven by our core values of humanity, excellence, and creativity, our team is determined to deliver on our mission and transform the energy landscape for the better.

Feeling energized to make a meaningful impact on the world? Then keep reading - you’ve come to the right place.

## Role Description

The Mechanical Engineering team at Form is focused on designing the battery cell, module, and full pack system that forms the foundation of our innovative utility-scale multi-day energy storage system. We strive to deliver designs that are optimized for performance, quality, reliability, and cost for high-volume manufacturing at Form Factory.

We're hiring a hands-on Staff Mechanical Design Engineer to own the design of subsystems within our Thermal management system. This is a critical system in Form’s iron-air battery technology and it is vital to the system’s successful operation and cell temperature control. In this role, you will play a key part in the product architecture and detailed design stages, first-of-a-kind build activities, system verification, and design for cost. You can expect to build and verify analytical models of the system, lead prototyping efforts, and work closely with controls engineers to implement the system concept of operations.

If this sounds like the right position for you, apply now! This opportunity will help shape and scale our multi-day energy storage system, contributing to the growth of a fast-moving company with breakthrough technology and an incredible mission, contributing to a sustainable future!

Relocation assistance is available.

What you'll do:

- Architect, design, prototype, and test the thermal management system to meet critical performance requirements
- Build and maintain thermal system analytical models that inform design architecture decisions
- Fabricate and test first-of-a-kind prototypes to validate system design choices
- Consider ways to design the product for high-volume manufacturing and reduce product cost
- Lead critical vendor engagements and collaborate with manufacturing engineers to transition system designs from prototype to high-volume production
- Collaborate with the Electrical and Controls teams to optimize actuator and sensor integration
- Mentor junior engineers and level up our mechanical engineering best practices
- Champion safety, especially in the development of new laboratory processes

What you'll bring:

- Degree in Mechanical Engineering or related field; Bachelor's with 8+ years of industry experience in mechanical design of equipment, liquid or gas handling systems
- Understanding of first-principles fluids modeling and experience optimizing designs for manufacturing and cost-down
- Experience working in a manufacturing environment or with contract manufacturing vendors
- Demonstrated experience optimizing mechanical design, thermodynamic systems, and interdisciplinary interfaces of fluid systems
- Sense of urgency and self-driven to hit difficult schedule targets
- Direct experience in product development within an early-stage environment ramping into production

#LI-Onsite

## #LI-TR1

Humanity is a cornerstone of Form Energy’s culture, and we make sure our compensation and benefits reflect that. Form Energy offers competitive salaries, stock options, and a holistic benefits package to ensure all employees have what they need to thrive while working here.

When it comes to you and your family’s health, we cover 100% of medical, dental, and vision premiums for full-time employees - and 80% of healthcare premiums for dependents. This starts from day one. We also offer at least 12 weeks of paid leave for new parents (up to 20 weeks for birthing parents), and generous vacation policies to give employees time to recharge when needed.

To build America’s energy future, we need everyone at the table. We are proud to be an equal opportunity employer, and encourage candidates from all backgrounds to apply to our open jobs.

If you may require reasonable accommodations to participate in our interview process, please contact accommodations@formenergy.com. Requests for accommodations will be treated with discretion.

Form Energy is committed to maintaining the privacy of our applicants. Please be aware that we will never solicit sensitive personal information such as Social Security numbers or bank account details during the recruiting or hiring process.

## About Formenergy

## Core Business
- **Primary industry**: Energy storage / Clean energy technology / Battery manufacturing
- **Target customers**: Electric utilities, grid operators, large-scale energy developers, and industrial energy users (B2B, enterprise)
- **Mission/purpose**: To reshape the global electric system by creating a new class of low-cost, multi-day energy storage systems that strengthen the grid and enable a sustainable energy future.

## Products & Services
- **Iron-Air Battery System**: A proprietary battery that stores energy for up to 100 hours at a fraction of the cost of lithium-ion. Designed for grid-scale applications to firm renewable energy and replace peaker plants. [formenergy.com](https://formenergy.com/)
- **Formware™**: An advanced software tool that helps utilities and grid operators model the value of multi-day energy storage in their portfolios. [formenergy.com/about](https://formenergy.com/about/)

## Market Standing
- **Valuation**: Not publicly disclosed
- **Key Metric**: Total funding raised > $1.2 billion (as of Series F in 2024)
- **Notable Investors/Partners**: T. Rowe Price (led Series F), Breakthrough Energy Ventures, Prelude Ventures, The Engine, TPG Rise, Coatue Management, ArcelorMittal’s XCarb fund, Eni Next, Capricorn Investment Group. [formenergy.com/about](https://formenergy.com/about/)
- **Growth Signals**:
  - Commercial pipeline exceeds 750 MW / 75 GWh under agreement.
  - Announced 300 MW / 30 GWh project with Xcel Energy to power a Google data center in Minnesota.
  - Selected by U.S. DOE for an 85 MW / 8,500 MWh project in Maine – the largest energy storage project by energy capacity announced globally at the time.
  - First international deployment: 10 MW / 1,000 MWh system with FutureEnergy Ireland.
  - Strategic supply agreement with Crusoe (AI data center company) for 12 GWh of iron-air batteries.
  - Manufacturing facility (Form Factory 1) in Weirton, WV – 550,000 sq ft, employing ~400 people, now in trial production. [formenergy.com/about](https://formenergy.com/about/)

## Competitive Advantages
- **Technology moat**: Iron-air chemistry is fundamentally low-cost (using abundant materials) and safe (no thermal runaway, passed UL9540A).
- **Duration leadership**: 100-hour storage fills a critical gap between short-duration lithium-ion and seasonal storage, enabling true 24/7 renewable power.
- **Manufacturing scale**: First high-volume factory built on a former steel mill site in the U.S., leveraging domestic supply chains and skilled labor.
- **Proven field performance**: Over 34,700 sub-scale cells, 6,200 full-scale cells, 170 modules, and 10+ grid-connected systems tested. [formenergy.com/about](https://formenergy.com/about/)

## Strategic Focus
- Rapidly scaling manufacturing at Form Factory 1 and expanding commercial deployments with major utilities.
- Entering new international markets (Ireland, and exploring others).
- Supporting the energy needs of AI data centers and other high-demand loads through long-duration storage.
- Continuing R&D to improve cell performance and reduce costs further. [formenergy.com/about](https://formenergy.com/about/)

## Why Work Here
- **Culture**: Driven by core values of Humanity, Excellence, and Creativity. Emphasis on inclusion, empathy, pragmatic optimism, and tackling hard challenges.
- **Locations**: R&D in Somerville, MA; engineering in Berkeley, CA; manufacturing in Weirton, WV; remote/hybrid options available for some roles.
- **Benefits**:
  - 100% of medical, dental, and vision premiums covered for employees; 80% for dependents.
  - Health insurance starts day one.
  - Up to 12 weeks paid parental leave (more for birth parents).
  - Stock options granted to all employees.
  - Company-sponsored 401k.
  - Annual professional development budget.
  - Employee Resource Program (financial/legal guidance).
  - Mental health counseling services.
  - Life insurance, short- and long-term disability.
- **Team size**: Nearly 1,000 employees as of early 2025, with plans to grow. [formenergy.com/careers](https://formenergy.com/careers/)
- **Awards**: Recognized as a Breakthrough Energy company; multiple industry accolades for innovation.

## Sources
1. [formenergy.com](https://formenergy.com/)
2. [formenergy.com/about](https://formenergy.com/about/)
3. [formenergy.com/careers](https://formenergy.com/careers/)
4. [linkedin.com](https://www.linkedin.com/company/form-energy)
5. [crunchbase.com](https://www.crunchbase.com/organization/form-energy)

## Other roles at Formenergy

- [Staff Characterization Chemist](https://feeny.ai/job/staff-characterization-chemist-formenergy-somerville-9eahda5vh88b) — Somerville, MA
- [Staff Commissioning Engineer](https://feeny.ai/job/staff-commissioning-engineer-formenergy-berkeley-3957m8mfsd67) — Berkeley, CA
- [Staff Mechanical Engineer, Hardware Engineering](https://feeny.ai/job/staff-mechanical-engineer-hardware-engineering-formenergy-berkeley-cfxrf072d3zb) — Berkeley, CA
- [Staff Manufacturing Engineer](https://feeny.ai/job/staff-manufacturing-engineer-formenergy-weirton-2h15a13z0kr4) — Weirton, WV
- [Supervisor, Production Warehousing](https://feeny.ai/job/supervisor-production-warehousing-formenergy-weirton-jb4368bh4rc5) — Weirton, WV
- [Staff Controls Engineer](https://feeny.ai/job/staff-controls-engineer-formenergy-berkeley-218ca5g54gsz) — Berkeley, CA
- [Financial Analyst, Supply Chain](https://feeny.ai/job/financial-analyst-supply-chain-formenergy-berkeley-tvzznp6xq10d) — Berkeley, CA
- [Quality Control Engineer, Analytical Methods](https://feeny.ai/job/quality-control-engineer-analytical-methods-formenergy-weirton-xhtw3gcyj02t) — Weirton, WV
- [Senior Cathode Process Development Engineer](https://feeny.ai/job/senior-cathode-process-development-engineer-formenergy-weirton-jv1553w5n3wd) — Weirton, WV
- [Senior Materials Scientist, R&D](https://feeny.ai/job/senior-materials-scientist-r-d-formenergy-somerville-vzrmn2yqmvbx) — Somerville, MA