Our Leadership

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Ryan Popple

President and CEO

Ryan Popple is the president and CEO of Proterra, the leading innovator of zero-emission, battery-electric buses. Prior to Proterra, Ryan was a partner at Kleiner Perkins Caufield & Byers. An early employee of Tesla Motors, he was senior director of finance, with a focus on strategic planning, technology cost reduction and corporate finance. Ryan serves as a board member of the Silicon Valley Leadership Group and is focused on increasing access to affordable, sustainable transportation solutions throughout Silicon Valley and the Bay Area, through strategic partnerships and policy initiatives. He is also a member of the California League of Conservation Voters Green Advisory Council where he provides guidance on political and legislative priorities, communications planning and development efforts. Ryan has served in the U.S. Army, received a bachelor’s in business administration from the College of William & Mary and a master’s in business administration from Harvard University.

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Amy Ard

Chief Financial Officer

Amy Ard serves as Proterra’s chief financial officer. With more than twenty years of experience in finance and various manufacturing industries, Ard brings a rare combination of expertise leading both large public companies and private companies through significant stages of growth. At Proterra, she is supporting the company’s next level of expansion by aligning corporate finance with all aspects of the business, from engineering and manufacturing to sales and marketing and operations. Ard’s experience at PricewaterhouseCoopers (PwC) defined her career and passion for manufacturing early on. Before joining Proterra, Ard was CFO at AMG Advanced Metallurgical Group (AMG), a publicly held global specialty metals and engineering company. During her tenure as CFO, net debt was driven down by over $200 million and AMG’s share price improved by over 30 percent, despite a significant downturn in the commodity sector. Ard also took AMG through a $275 million IPO, refinanced a $320 million debt facility, led the integration of two key acquisitions with purchase prices in excess of $25 million and implemented a global cash and risk management system. Over the course of her career, Ard has accrued multifaceted corporate finance experience and has proven her unique ability to build talented teams, create operational excellence, and manage cash flows for capital-intensive projects, while accurately forecasting quarterly financial earnings.

Ard holds a bachelor’s in accountancy and an MBA, both from Villanova University.

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Gary Horvat

Chief Technology Officer

Proterra CTO Gary Horvat has over 35 years of experience in the automotive industry, with an educational background in both industrial and manufacturing engineering, including a Ph.D. 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 third-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 GM, 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.

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Matt Horton

Chief Commercial Officer

Matt brings a broad range of experience to his role as chief commercial officer. Prior to joining Proterra, he 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. Matt 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. Matt 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.

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Josh Ensign

Chief Operating Officer

Josh Ensign serves as chief operating officer for Proterra. In his role, he leads all of Proterra’s manufacturing operations in Silicon Valley, Southern California and South Carolina, as well as the Procurement, Facilities, IT and HR functions. A U.S. Army veteran and former executive of Honeywell International and Tesla Motors, Ensign’s track record includes leading global operations for 42 factories in 15 countries and managing the supporting supply chains. As vice president of manufacturing at Tesla Motors, Ensign was responsible for all manufacturing activities at the Fremont, California production site. This included the installation of the current Model S high volume production line, the launch of both the dual-motor platform and the Model X, and the establishment of Tesla’s new seat manufacturing facility. Before Tesla, Ensign led global operations in Honeywell International’s automotive and aerospace businesses. Ensign has extensive functional experience in supply chain, logistics, purchasing, and manufacturing and has lived and operated abroad in Germany, Mexico, China and Switzerland. Josh has a bachelor's in engineering from Gonzaga University and an MBA from the University of Southern California.

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JOANN COVINGTON

Chief Legal Officer & Head of Government Relations

JoAnn Covington, Proterra's chief legal officer, leads the company's legal and government relations, and serves as corporate secretary. JoAnn joined Proterra from advertising technology firm, Rocket Fuel Inc., where she served as senior vice president and general counsel and led the legal, policy, business affairs and business development functions. While there she was instrumental in leading Rocket Fuel through its 2013 IPO when that company was the fastest growing technology company on Deloitte’s Fast 500. Prior to Rocket Fuel, JoAnn held senior legal roles for Electronic Arts Inc., an entertainment software company. She began her career with Fenwick & West LLP representing technology companies in intellectual property litigation. JoAnn received her law degree from Harvard Law School, magna cum laude.

Board of Directors

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Rob Johnson

Chairman of the Board

Rob Johnson is an operating partner in the Greentech Group at Kleiner Perkins Caufield & Byers. In addition to more than 20 years of experience in greentech management, financial planning and business development, Rob has a track record of delivering growth through product development and commercialization. His energy sector background includes serving in an executive role at A123 Systems, a world leader in the development, manufacturing and sale of advanced battery technology and systems. Rob earned a Bachelor of Science and honorary Ph.D. in engineering management from the University of Missouri S&T.

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Jack Allen

Board Member

Jack Allen is a results-focused leader who has spent his career defining the commercial truck industry.

He has more than three decades of experience in the driving core businesses at Navistar International Corporation where he successfully strengthened its core businesses, improved quality and customer satisfaction, drove profitability and delivered value to shareholders.

He most recently served as Navistar’s executive vice president and chief operating officer, and previously was president of that company's North America truck and parts division. Allen also served as president of Navistar's engine group, where he led major business initiatives including the acquisition of Brazilian engine producer MWM and a partnership with MAN of Germany. He also has served as vice president and general manager of the company's parts organization.

He holds a bachelor of science degree from the Milwaukee School of Engineering and an MBA from the Illinois Institute of Technology. He serves on the boards of the Milwaukee School of Engineering's Board of Regents and Lurie Children's Hospital of Chicago.

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Gregory Pratt

Board Member

Gregory A. Pratt joined our board of directors in July 2017. He also serves as chairman of the board of directors for Carpenter Technology Corporation and has served on Carpenter’s board since 2002 and as its interim president and CEO during fiscal years 2010 and 2015. Greg is former vice chairman and a director of OAO Technology Solutions, Inc. (OAOT), an information technology and professional services company. He joined OAOT in 1998 as president and CEO after OAOT acquired Enterprise Technology Group, Inc., a software engineering firm he founded. Greg served as president and CEO of Intelligent Electronics, Inc. from 1991 through 1996, and was co-founder, and served 1984-1991as CFO and president of Atari (U.S.) Corporation. Since February 2014, Greg has served as a director of Tredegar Corporation, a public company listed on the NYSE, where he serves as the chairman of the governance committee and a member of the special finance and audit committees. He served as a director and audit committee chairman of AmeriGas Propane, Inc., a public company listed on the NYSE until April 2013. Mr. Pratt is also a National Association of Corporate Directors Board Leadership Fellow.

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Mike Smith

Board Member

A respected and authoritative voice in the energy sector, Michael Smith leads Constellation Technology Ventures, the venture capital arm of Exelon Corp., which invests in energy-related start-up companies and technologies suitable for commercialization. Mike has worked in various legal, regulatory and commercial roles throughout the United States and Europe and has a strong background in the strategic development and implementation of renewable and sustainable energy product offerings. Mike also serves as director or observer on several other corporate boards. Mike holds a bachelor of arts degree from the University of Miami and a J.D. from the Duke University School of Law.

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Ryan Popple

Board Member, President and CEO

Ryan Popple is the president and CEO of Proterra, the leading innovator of zero-emission, battery-electric buses. Prior to Proterra, Ryan was a partner at Kleiner Perkins Caufield & Byers. An early employee of Tesla Motors, he was senior director of finance, with a focus on strategic planning, technology cost reduction and corporate finance. Ryan serves as a board member of the Silicon Valley Leadership Group and is focused on increasing access to affordable, sustainable transportation solutions throughout Silicon Valley and the Bay Area, through strategic partnerships and policy initiatives. He is also a member of the California League of Conservation Voters Green Advisory Council where he provides guidance on political and legislative priorities, communications planning and development efforts. Ryan has served in the U.S. Army, received a bachelor’s in business administration from the College of William & Mary and a master’s in business administration from Harvard University.

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Jennifer Granholm

Board Member

Jennifer Granholm became the first woman to be elected as governor of Michigan in 2002, and in 2006 she was re-elected with the largest number of votes ever cast for governor in the state. As a result of the meltdown in the auto industry and the global shift in manufacturing jobs, Michigan had the toughest economy in the nation and Granholm worked relentlessly to diversify it, adding new jobs and emerging sectors, such as clean energy, to Michigan’s economic portfolio. As a result of her leadership, Michigan led the country in the improvement of job market conditions between 2009 and 2010, according to the Gallup Job Creation Index.

As governor, Granholm pioneered clean energy policies and worked with business and labor, Republicans and Democrats to create new economic opportunities and jobs in Michigan. She led an aggressive strategy to make Michigan the hub of clean-energy development in North America by developing entire supply chains in Michigan, fostering critical partnerships between industry, government and researchers and by creating economic incentives that made Michigan the place to locate. Granholm’s plan included specific clustering strategies targeted at battery manufacturing, bio-energy, solar, and wind power.

Prior to her two terms as governor, Granholm was Michigan’s attorney general from 1998-2002. After leaving public office, Granholm joined the faculty at UC Berkeley, teaching courses in law and public policy, and was named a senior research fellow at the Berkeley Energy and Climate Institute. In that capacity, Granholm is chair of the American Jobs Project, a major research initiative focused on state-based policies to create advanced manufacturing jobs in clean energy. Granholm is a senior contributor to CNN, is the CEO of Granholm Mulhern Associates, and serves on several boards. She is also the co-author of the political bestseller, A Governor’s Story: The Fight for Jobs and America’s Economic Future and was a senior partner on jobs and energy policy during Hillary Clinton’s 2016 presidential campaign.

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Brook Porter

Board Member

A respected investor, advisor and entrepreneur at the intersection of technology and sustainability, Brook Porter brings decades of energy, transportation and agriculture expertise to G2VP as a founding partner.
Brook joined Kleiner Perkins in 2010, where he led investments within their Green Growth Fund in Farmers Edge (shares acquired), Turo, Uber, DJI and sits on the board of Proterra.
A serial entrepreneur, Brook co-founded two sustainable transportation companies prior to joining Kleiner Perkins: Intelligent Energy, a fuel cell technology company and Primafuel, a low-carbon fuels company. Brook’s roles in both companies ranged from R&D to leading engineering and operations to driving multiple financings for the company.
Brook holds a B.S. degree in chemical engineering from the University of California, Berkeley, with an emphasis in environmental technology. He is named on multiple U.S. and international patents in the field of renewable energy, and transportation.

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Jon Lauckner

Board Advisor

Jon Lauckner is the CTO of General Motors and the president of General Motors Ventures, LLC. Through these roles, Jon is responsible for leading GM’s Global Research and Development organization and making venture capital investments in startup companies that are developing next-generation automotive technology. During his 30+ year tenure at GM, he has been heavily involved in many areas of the company, including product development, product engineering, powertrain engineering, product planning and program management. He also worked in international assignments for GM in South America and Europe for 13 years. Jon received a B.S. in mechanical engineering from the University of Michigan, an M.S. in management from Stanford University, where he was a Sloan Fellow, and attended the Harvard Senior Executive program.

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Alisa Do

Board Advisor

Alisa Do serves as the director of the CEO’s Office and supports matters coming before the Edison International Managing Committee as well as activities at Edison International and its subsidiaries, Southern California Edison and Edison Energy Group.

Alisa began working with Edison International as a consultant to the company in Washington, DC in 2012 and shortly thereafter joined the company as a principal advisor for Federal Government Affairs. During this time she was responsible for representing the company’s interests to Congress, the Administration, stakeholder groups and trade associations on federal issues including nuclear energy and spent fuel, transmission and distribution policy, public lands and renewable energy.

Prior to joining Edison International, Alisa spent 12 years on Capitol Hill, most recently as legislative director to former House Rules Committee Chairman David Dreier (retired), and executive director of the California Republican Congressional Delegation where she led bipartisan statewide policy efforts on water, transportation and federal funding for California.

Alisa serves as the vice chair of the Leadership Council for the Downtown Women’s Center, an organization dedicated to addressing the needs of women overcoming poverty and homelessness in Los Angeles. She earned her MBA from George Washington University and bachelor's in Sociology and Government from Scripps College in Claremont, California.