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Redwood Materials

Recycles lithium-ion batteries into materials

Mechanical Design Engineer - Energy Storage

Design EngineeringConfirmed live in the last 24 hours
Full-timeSan Francisco, CA, USA$125k - $165kIn-person

About the Job

Requirements

  • A BS or MS in Mechanical Engineering or a related field is desired.
  • One to three years of mechanical engineering experience, with a strong focus on power conversion or energy storage products, ideally for mass production.
  • Understanding of the relationship between high-voltage electronics and the mechanical systems that support and surround them, including insulation and thermal systems.
  • A proven track record as a senior mechanical engineer, with hands-on design, prototyping, and launch experience in medium-to-high-volume production of 10,000 units per year or higher.
  • Proficiency in computer-aided design tools such as SolidWorks and analysis tools such as computational fluid dynamics and finite element analysis.
  • Experience developing tools, infrastructure, and design practices for a growing team.
  • Ability to manage work in a startup environment while balancing multiple priorities and deadlines.
  • Ability to build relationships across organizational levels and present to internal and external executives.

Responsibilities

  • 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 and 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 analyses, including computational fluid dynamics, finite element analysis, and thermal analysis, to validate designs and ensure performance under real-world conditions.
  • Collaborate with electrical and systems engineers to integrate mechanical systems into the overall system architecture.
  • Select materials and components, working with suppliers and vendors to ensure cost-effective, high-quality solutions.
  • Manage engineering work hands-on and remain accountable for project goals and timelines.
  • Recruit, mentor, and manage a high-performance mechanical engineering team.
  • Contribute to a collaborative startup environment and work toward company milestones.

Desired Qualifications

  • An understanding of the relationship between high-voltage electronics and supporting mechanical systems, including insulation and thermal systems.
  • Experience in mechanical engineering focused on power conversion or energy storage products, ideally for mass production.
  • Hands-on design, prototyping, and launch experience in medium-to-high-volume production of 10,000 units per year or higher.
  • Experience developing tools, infrastructure, and design practices for a growing team.

About the Company

Redwood Materials

Recycles lithium-ion batteries into materials

Redwood Materials builds a circular supply chain for lithium-ion batteries. It collects end-of-life batteries and manufacturing scraps, recovers most of the valuable minerals using its own processes, and then refines and remanufactures those materials into essential battery components like cathode active materials and anode copper foil, which are sold to battery manufacturers. In 2025 it added Redwood Energy to repurpose used EV batteries into grid-scale energy storage systems. The company differentiates itself through vertical integration across the full value chain—collection, recycling, refining, and remanufacturing—plus a focus on domestically sourced materials, high recovery rates, and partnerships with large automakers and battery makers. Its goal is to create a sustainable, domestic, closed-loop supply of battery materials to support electric vehicles and grid storage while reducing waste and dependence on imported minerals.

Company size
501-1,000
Company stage
Late Stage VC
Total funding
$4.8B
Headquarters
Carson City, NV
Founded
2017

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