Mechanical Design Engineer, Energy Storage San Francisco, California, United States

Redwood Materials, Inc.; San Francisco (CA); On-site; USD 117,500 - 227,500; Full time

Job summary

A sustainable energy technology company in San Francisco is seeking a Mechanical Design Engineer to lead the design and development of high-power energy conversion products. You will manage engineering projects, collaborate on system integration, and drive innovation in energy storage solutions. Ideal candidates have over 7 years of experience, expertise in mechanical design, and a passion for sustainability. This full-time role offers a competitive salary ranging from $117,500 to $227,500, depending on experience.

Qualifications

• 7+ years of experience in mechanical engineering focused on power conversion or energy storage.
• Hands-on design, prototyping, and launch experience in medium-to-high volume production.
• Understanding of high voltage electronics and the associated mechanical systems.

Responsibilities

• Lead mechanical design and development from concept to deployment.
• Drive innovation and solve technical challenges on a large scale.
• Perform mechanical analysis to validate designs and ensure performance.

Skills

Mechanical design

Power conversion

Thermal management

CAD proficiency (e.g., SolidWorks)

Interpersonal skills

Education

BS or MS in Mechanical Engineering or a related field

Tools

CFD analysis

FEA analysis

Job description

Mechanical Design Engineer, Energy Storage

About Redwood Materials

Redwood is localizing a global battery supply chain that seamlessly integrates recovery, reuse, and recycling—keeping critical minerals in circulation and driving the energy transition. Founded in 2017, we’re delivering low-cost and large-scale energy storage and producing battery materials in the U.S. for the first time, all from batteries we already have.

Mechanical Engineer, Energy Storage

You will be an early member of a new engineering team, taking a hands‑on role in the design, development, and integration of a new high‑power electromechanical product line at Redwood. This position starts as a senior individual contributor, where you'll be responsible for designing critical mechanical components and systems related to high power electronics, including thermal management, harnessing, enclosures, structures, and reliability while also collaborating closely with electrical, software, and systems engineering teams. As the product builds momentum, you will be instrumental in building and leading a mechanical engineering team, setting the foundation for scaling our product into high volume manufacturing.

The ideal candidate is highly self‑driven, adaptable to a startup environment, and eager to take on both technical and leadership challenges. You’re a leader and a doer, excited about working in a dynamic, fast‑paced setting, and want to shape the mechanical engineering function within a new department at Redwood.

If necessary, we will adjust the job level to suit your experience and responsibilities.

Responsibilities will include:

• Lead and execute the mechanical design and development of a high-volume, high-power energy conversion product from concept to deployment, including thermal management, authoring requirements, structural design, packaging/integration of power electronics, and integration with grid infrastructure
• Act as the primary mechanical engineering expert, driving innovation and solving technical challenges at a large scale
• Perform mechanical analysis (CFD, FEA, thermal, etc.) to validate designs and ensure performance under real-world conditions
• Collaborate with electrical and systems engineers to ensure seamless integration of mechanical systems into the overall system architecture
• Select materials and components, working closely with suppliers and vendors to ensure cost‑effective, high‑quality solutions
• Be a hands‑on engineering manager, accountable for project goals and timelines
• Take a leadership role in recruiting, mentoring, and managing a high‑performance mechanical engineering team
• Contribute to a collaborative, fast‑paced startup culture, where every team member plays a crucial role in achieving company milestones

Desired Qualifications:

• BS or MS in Mechanical Engineering or a related field
• 7+ years of experience in mechanical engineering, with a strong focus in power conversion or energy storage products, ideally for mass production.
• An understanding of the relationship between high voltage electronics and the mechanical systems that support and surround them (e.g. insulation systems and thermal systems.)
• Proven track record as a senior mechanical engineer, with hands‑on design, prototyping, and launch experience in medium-to‑high volume production (10,000 units/yr or higher).
• Proficiency in CAD (e.g., SolidWorks) and analysis tools (CFD, FEA, etc.).
• Experience developing tools, infrastructure and design practices for a growing team
• Self‑motivated, with the ability to manage your work in a startup environment, balancing multiple priorities and deadlines.
• Excellent communication and interpersonal skills, capable of building relationships with all levels of the organization and presenting to internal and external executives
• Passion for sustainability and making the world a better place!

In accordance with California pay transparency laws, the salary range for this position is listed below. Actual compensation may vary based on a variety of factors, including experience, education, and skills.

$117,500 - $227,500 USD

The position is full‑time. Compensation will be commensurate with experience.