Ryan Popple

President & Chief Executive Officer

Ryan Popple is the CEO of Proterra, the leading manufacturer of Electric Vehicles (EVs) for the Transit Industry. Proterra vehicles replace diesel buses in cities, and are currently deployed in a dozen U.S. cities. Proterra vehicles have logged over 1,000,000 service miles, eliminating a quarter-million gallons of diesel consumption and reducing 4 million pounds of air pollutants. Proterra is an integrated technology and manufacturing company, with engineering and manufacturing teams in South Carolina and California.

Prior to his role as CEO of Proterra, Ryan was a Partner at the venture capital firm Kleiner Perkins Caufield Byers. He was an early employee of Tesla Motors, where he served as Senior Director of Finance, with a focus on strategic planning, technology cost reduction and corporate finance.

Eric McCarthy


Eric McCarthy is the Vice President of Government Relations, General Counsel and Corporate Secretary of Proterra Inc, the nation’s leading provider of battery all-electric transit buses.  Committed to improving public mobility solutions, Eric has served on the Greenville County Roads Advisory Commission and is a member of the Upstate Transit Coalition and Upstate SC Alliance.  Eric brings nearly twenty years of executive leadership experience to Proterra. Before joining Proterra, he served as General Counsel of both private and public companies, including Honeywell Technology Solutions, Inc., a Honeywell subsidiary. Prior to joining Honeywell, Eric was an antitrust trial litigator, and was a Partner in the Antitrust & Competition practice groups of Latham & Watkins LLP and Howrey in Washington, D.C. He attended Dartmouth College and the University of Pennsylvania Law School.

Sheri Bebb

Sheri Bebb, Proterra VP HR

As VP, Human Resources, Sheri brings over 20 years of strategic Human Resources experience managing global Talent Strategy, Leadership and Development, Organization Development, and Employment Engagement.

Prior to Proterra, Sheri was Vice President of Organization Effectiveness for NetApp and was the head of HR for a solar start up as well as GOJO, a family-owned company who are the makers of Purell®.  Other roles include HR Business partner for the Consumer Products and Health Care divisions of Kimberly-Clark, and a global IT HR business partner and Organization Effectiveness consultant at Hewlett-Packard.  She enjoys leading change initiatives that result in winning businesses.  Sheri has an undergraduate degree in communications from Stanford University, a MBA from University of Santa Clara, and a Masters and Ph.D. in Organizational Psychology from Alliant International University.

Matt Horton


Matt brings a broad range of experience to his role as Senior Vice President of Sales and Marketing. Prior to joining Proterra, Horton most recently served as CEO of Propel Fuels, Inc., a leading clean transportation company. Matt led Propel through a period of high growth, earning Propel a spot on the Inc 500 as one of America’s fastest growing companies. While there he was responsible for strategy and planning, government relations, operational execution, financial management, investor relations, communications, partnerships, and corporate development.

Horton is an experienced company builder with a passion for growing sustainable businesses. Over the course of his career, he has been an operating executive, venture capitalist, and investment banker, working with dozens of startup and emerging growth companies in Silicon Valley since the late 1990s. Horton is a regular speaker at clean energy industry conferences and was awarded the prestigious Industry Leadership Award at the World Biofuels Forum in Rotterdam for his work in advancing the biofuels industry.

Ed Lyghtel

Ed Lyghtel

Ed Lyghtel will support the site development team in the development of a safe, efficient facility yielding a high quality product. Ed’s background includes leadership roles at Ford Motor Company, Visteon Automotive, Blue Bird Bus Company, and Federal Mogul in the areas of manufacturing, engineering, and quality. As Plant Manager at multiple sites he was responsible for facility and capital improvement projects from concept to launch. While at Blue Bird, he oversaw expansion projects including the addition of a vehicle assembly line and the development of a second facility including building procurement, site preparation, equipment installation and start up. At Ford Motor, he was a member of the team that launched a greenfield component manufacturing facility in Hungary. At Visteon Automotive, he was launch manager for the expansion of a component manufacturing facility, implementing new technology to support a major vehicle launch.

Charlie Plummer

Charlie Plummer

Charlie Plummer leads the Finance and IT functions in his role as Chief Financial Officer for Proterra, the leading provider of Electric Vehicles (EVs) for the Transit Industry. Charlie is a seasoned business leader and brings over twenty years of experience to the table in corporate finance and operations with Fortune 500 companies as well as middle-market businesses. Charlie began his business career at Ford Motor Company, with eleven years in finance roles supporting manufacturing, marketing and sales and product development. After his at time Ford, Charlie served as VP of Finance for Fisher Scientific US, the largest division of Thermo Fisher Scientific with $1.8 Billion in revenue. Charlie held Chief Financial Officer and Chief Operating Officer roles at Bel Art Products and most recently, Charlie was Chief Financial Officer for Martex Fiber Southern Company, a textile recycling business headquartered in Charlotte, North Carolina.

Gary Horvat

Gary Horvat, Proterra CTO

As Proterra’s CTO, Gary has over 35 years of experience in the automotive industry, with an educational background in both Industrial and Manufacturing Engineering, including a Doctorate in Industrial Engineering.  Gary started at Eaton Corporation out of college and was at General Motors for the majority of his career, mostly in Powertrain.  At GM, Gary started as a Valvetrain Design Engineer on V6 engines, winning the Popular Science “Best of What’s New” Award for his Assembled Camshaft design.  He was responsible for the engine controls on the 3rd Generation Small Block V8 and as Assistant Chief Engineer launched the 3900 V6 Engine, winning the Popular Mechanics “Breakthrough” Award.  As Chief Engineer for Transmission and Hybrid Controls, Gary had his first experience working on electric vehicles with the GM Two-Mode Hybrid and Chevy Volt.  Gary’s last position at GM was as Executive Director of Engineering Operations, managing Powertrain Global Development, Testing, and Validation facilities.

After General Motors, Gary worked at Fisker Automotive as Vice President of Product Development on the Fisker Karma Extended Range Electric Vehicle. His most recent position was as VP of Powertrain at DENSO International.

Gary enjoys driving engineering for companies and products that make a difference and leave a long term impact on society.