J. B. Straubel

Jeffrey Brian Straubel (born December 20, 1975) is an American businessman and electrical engineer.

He built an electric Porsche 944 that earned the 240 V SC/B world electric vehicle racing record in 2000.

Four years after leaving Tesla, Straubel was elected to its board as an independent director in May 2023.

Straubel joined Tesla as its fifth employee in 2004, and is named as a co-founder.

His photograph was taken in July 2006 driving Governor Arnold Schwarzenegger in the Tesla Roadster at its unveiling in Santa Monica, California.

Popular Science magazine featured Straubel in a full-length article in April 2007.

In September 2007, Straubel spoke on an energy panel titled "Clean, Secure, and Efficient Energy" at Stanford University along with former Secretary of State, George P. Shultz, where he emphasized the importance of education about climate change, and decreasing the CO2 intensity of our current energy production methods.

In early 2008, Stanford Magazine featured Straubel's role in growing the Stanford presence at Tesla.

Straubel was honored to keynote the Stanford Alumni EDAY in July 2008.

Also in July 2008, Straubel spoke on a transportation panel "Progression Toward EVs" at Plug In 2008.

In 2008, Straubel was named Innovator of the Year by MIT's Technology Review in their annual TR35 innovators in the world under the age of 35.

He spoke at MIT's Emtech conference on a panel on green transportation in Boston, MA in September 2008.

In March 2012, Straubel spoke at the DESIGN West conference, produced by UBM Electronics, at the McEnery Convention Center in San Jose, CA.

On August 3, 2013, Straubel married Boryana Dineva and they lived in Woodside, California.

He was also a lecturer at Stanford University for the 2015-2016 academic year, where he taught the energy storage integration classes (CEE 176C & CEE 276C) in the Atmosphere and Energy Program.

In 2015 she gave birth to twins.

In 2017, Straubel founded and became the CEO of Redwood Materials, Inc., working on creating battery materials and products for lithium-ion batteries out of recycled batteries.

Straubel holds a Bachelor of Science in energy systems engineering and a Master of Science in energy engineering from Stanford University.

In 2017, Straubel established Redwood Materials, working on the recycling of lithium-ion batteries and e-waste.

Prior to Tesla, Straubel was the CTO and co-founder of Volacom along with Harold Rosen.

Volacom worked closely with Burt Rutan at Scaled Composites to design a specialized high-altitude aircraft platform using a novel hydrogen-powered electric power plant.

At Volacom, Straubel co-invented and patented a new long-endurance hybrid propulsion concept that was later licensed to Boeing.

In the area of technical expertise, Straubel has consulted with venture capital firms Taproot Ventures and Kleiner Perkins, in addition to several other private equity investors, to conduct technical due diligence reviews for many start-ups in the energy and clean energy technologies category.

Straubel is on the board of QuantumScape and also consults with Amory Lovins at the Rocky Mountain Institute.

Although he did not originally intend to work in the automobile industry, Straubel has long had a passion for electric vehicles.

Redwood Materials is a company established in Nevada by Straubel in 2017, to recycle lithium-ion automotive battery packs on a large scale.

He spent 15 years at Tesla, as chief technical officer until moving to an advisory role in July 2019.

In 2023, he was elected to the company's board of directors.

He was its inaugural chief technical officer until moving to an advisory role in July 2019.

At Tesla, Straubel led battery cell design, supply chain and led the first Gigafactory concept through the production ramp of the Model 3.

He had a direct role in research and development, team building, and operational expansion from prototype cars through to mass production and expanding battery production to gigawatt-hour scale.

Straubel also had responsibility for new technology evaluation, technical due diligence review of key vendors and partners, intellectual property, and systems validation testing.

In addition to his work at Tesla, Straubel was also on the board of directors at SolarCity.

As the result of a court settlement, Straubel is legally considered to be a co-founder of Tesla.

When Straubel left as CTO at Tesla in July 2019, they moved to Nevada where Redwood Materials was located.

She had worked as a manager in human resources at Tesla and was a vice president of human resources at the Wikimedia Foundation for one year.

On June 19, 2021, Boryana was killed while cycling in a designated bike lane in a rural area when a car crossed a double yellow line on Old Highway 395 in Washoe County, Nevada and hit her head-on.

The driver was unlicensed.

, the company had been operating in stealth mode as the technologies and processes were developed to enable the company to begin operation in the early 2020s.

On August 29, 2020, Straubel was interviewed by The Wall Street Journal and revealed additional details: