Executive Officers

William J. Sandbrook, 66
Executive Chairman and Chairman of the Board of Directors

From 2021 to 2024, he was the Co-Chief Executive Officer and the chairman of the board of directors of Andretti Acquisition Corp. Mr. Sandbrook has extensive corporate management experience, serving as the President, Chief Executive Officer and Chairman of the board of directors of U.S. Concrete, Inc. (NASDAQ: USCR), an American concrete, heavy construction aggregates and related-solutions company. He joined U.S. Concrete, Inc in 2011 as President and Chief Executive Officer and spearheaded turnaround efforts, selling off low-margin units and refocusing U.S. Concrete, Inc on its core competencies. Under Mr. Sandbrook’s leadership, U.S. Concrete, Inc. became a top producer in North America, completed more than 35 acquisitions and grew sales by nearly 3.5x. U.S. Concrete, Inc. held leading market positions in New York, Philadelphia, San Francisco, Dallas-Fort Worth and Washington, D.C. During his time leading U.S. Concrete, Inc., Mr. Sandbrook worked with Matt Brown, who was the Senior Vice President and Chief Financial Officer from 2012 to 2015. Additionally, in June 2023, Mr. Sandbrook joined the board of directors of Knife River Corporation (NYSE: KNF), where he is Chairman of the Nominating and Governance Committee and is a member of the Audit Committee. In 2019, Mr. Sandbrook was elected Chairman of the National Ready-Mixed Concrete Association and in 2018, he joined the board of directors of Comfort Systems USA, Inc. (NYSE: FIX), where he is a member of both the Nominating and Governance Committee and the Compensation Committee. In addition to his prior work experience, Mr. Sandbrook was recognized for his efforts at Ground Zero after the September 11th bombing of the World Trade Center. Further, Mr. Sandbrook was named the Rockland County, NY 2002 Business Leader of the Year, the Dominican College 2002 Man of the Year and the American Red Cross 2003 Man of the Year for Southern New York. Earlier in his career, Mr. Sandbrook worked at Tilcon New York in 1992 and became President and Chief Executive Officer three years later. In 1996, Tilcon was acquired by CRH PLC. Mr. Sandbrook graduated from the U.S. Military Academy at West Point. After receiving his Bachelor of Science in Management, he spent 13 years in the U.S. Army, where his service included a four-year tour in Germany in cavalry and engineering units, three years as an associate professor in the Department of Mathematics at the U.S. Military Academy and two years as an army program representative to Raytheon. Mr. Sandbrook also served as a social aide to President Ronald Reagan while teaching at the U.S. Military Academy at West Point. In addition to his qualification as an Army Ranger, Mr. Sandbrook earned four Master’s degrees while in the service. He has received a Master of Business Administration from The Wharton School of the University of Pennsylvania, a Master of Science in Systems Engineering from the University of Pennsylvania, a Master in Public Policy from the Naval War College and a Master of Arts in International Relations from Salve Regina University.

Michael M. Andretti, 61
Special Advisor and Director

From 2021 to 2024, Mr. Andretti was the Co-Chief Executive Officer and a director of Andretti Acquisition Corp. Mr. Andretti is a world-renowned race car driver. He was crowned Championship Auto Racing Teams (“CART”) champion in 1991 and is now a successful team owner of many international racing efforts. Mr. Andretti has 42 race victories as a driver, the most in the CART era and fourth-most of all time. Retired from active racing, he is now Chairman and Chief Executive Officer of Andretti Global, a team that has won four INDYCAR® Series championships and five Indianapolis 500 races. Two years after his father, a legendary race car driver Mario Andretti, clinched the 1978 F1 World Championship, Mr. Andretti began his own racing career. He initially competed in Formula Ford and claimed victory in the 1982 SCCA Super Vee Championship with a Ralt RT5. Afterward, he raced in Formula Atlantic in 1983 and made his debut at Le Mans in the same year, finishing third in that race. Mr. Andretti was named Co-Rookie of the Year in the 1984 Indianapolis 500 and finished as championship runner-up in 1986. In 1991, he had a banner year, finishing second in the Indianapolis 500 before winning the Champ Car World Series. Mr. Andretti has also raced as part of McLaren’s Formula One team. After racing in the 2003 Indianapolis 500, Mr. Andretti retired from full-time INDYCAR racing and bought into “Team Green” which subsequently became Andretti Green Racing. In 2009, Andretti Green Racing restructured and emerged as Andretti Autosport, with Mr. Andretti as the sole owner. Across those years, the team won the INDYCAR title on multiple occasions with Tony Kanaan in 2004, Dan Wheldon in 2005, Dario Franchitti in 2007 and Ryan Hunter-Reay in 2012. Andretti Autosport has now become Andretti Global, a global racing institution born out of racing excellence. The team fields multiple entries in the NTT INDYCAR SERIES, Indy NXT Presented by Firestone and IMSA. Additionally, Andretti Global operates in the ABB FIA Formula E Championship, competing in the world’s first race series for fully-electric Formula cars and claiming the Drivers World Championship in 2023. The team also races in Extreme E as Andretti Altawkilat Extreme E, helping to further develop sustainability in racing. Overall, Andretti Global boasts a highly impressive track record of over 260 total race wins, four INDYCAR SERIES championships, three INDY NXT titles, one Indy Pro 2000 and one USF2000 championship, alongside five Indy 500 victories. In 2018, Mr. Andretti began a collaboration with Ryan Walkinshaw’s Walkinshaw Racing and Zak Brown’s United Autosports to create Walkinshaw Andretti United. Mr. Andretti has extensive business experience through his time running Andretti Global, as well as through personal business ventures. Andretti Global has successfully gained support from a vast portfolio of world class brands that serve as sponsors. In 2018, U.S. Concrete, Inc. announced a partnership with the race team. Andretti Global leveraged a long-term relationship with then-Chief Executive Officer Mr. Sandbrook to team up for Marco Andretti’s INDYCAR races as primary sponsor. Mr. Andretti has also owned various car dealerships, Speedmart stores, car washes, powersport stores and an apparel line throughout his business career.

William M. Brown, 59
Chief Executive Officer, Principal Financial and Accounting Officer

Mr. Brown has deep experience leading public and private companies, including both operating companies and special purpose acquisition companies, working across capital markets, executing mergers and acquisitions and transforming businesses to create shareholder value. In 2024, Mr. Brown joined the board of directors of Zapata Computing, Inc. Prior to joining our company in 2024, Matt served from 2022 to 2024 as the President and Chief Financial Officer, and from 2021 to 2022, as the Chief Financial Officer, of Andretti Acquisition Corp. From 2020 to 2021, he was Chief Financial Officer of Rocky Mountain Industrials, Inc., an early-stage aggregates and distribution logistics company focused on the Rocky Mountain region. From 2015 to 2017, Mr. Brown was the Executive Vice President and Chief Financial Officer of Forterra, Inc., a billion-dollar manufacturer of drainage and water pipe. From 2012 through 2015, Mr. Brown served as the Senior Vice President and Chief Financial Officer of U.S. Concrete, Inc., where he worked together with Mr. Sandbrook. From 2007 through 2012, Mr. Brown served as the Treasurer and Executive Assistant to the Chief Executive Officer, and from 2005 through 2007, as the Treasurer, of Drummond Company, Inc., a multibillion-dollar international coal producer. From 1999 through 2005, Mr. Brown served in the investment banking department of Citigroup Global Markets Inc., including as a Vice President in the basic industries coverage group. At Citigroup Global Markets Inc. Mr. Brown led both buy-side and sell-side M&A transactions as well as capital markets offerings of a variety of debt and equity securities. From 1988 through 1997, Mr. Brown served in the United States Navy as a SEAL Officer. He holds a Master of Business Administration degree from The Wharton School of the University of Pennsylvania and a Bachelor of Science degree in Mechanical Engineering from the United States Naval Academy.

Board of Directors

Zakary C. Brown, 52 [Resigned]
Director

At McLaren, Mr. Brown has overall responsibility for that business, including strategic direction, operational performance, marketing and commercial development. He is also the co-founder and Chairman of United Autosports, an auto sport company based in the United Kingdom that competes in different sports prototype categories across the world, including Virgin Australia Supercars, where they are partnered with Mr. Andretti through their team Walkinshaw Andretti United. Born and raised in California, Mr. Brown raced professionally around the world for 10 years before developing his skills in motorsport’s business and commercial worlds. In 1995, he founded Just Marketing, Inc. (JMI), which grew to become the one of the largest and most successful motorsport marketing agencies in the world. When JMI was acquired by CSM Sport & Entertainment, a division of Chime Communications, in 2013, Mr. Brown became the Chief Executive Officer. He then relinquished the position of the Chief Executive Officer to embark on his journey at McLaren in the winter of 2016. Mr. Brown also served as a member of the board of directors of Andretti Acquisition Corp. A passionate racer, collector and enthusiast, Mr. Brown is also a former member of the board of directors of Cosworth Engineering and a former chairman of the board of directors of Motorsport Network.

James W. Keyes, 69
Director

He has over 30 years of experience in retail, consumer products and aerospace. Mr. Keyes has been the Chairman of the board of directors of Key Development, LLC since 2005. Mr. Keyes formerly served as the Chairman of the board of directors of Wild Oats Marketplace, a producer of natural and organic food. During his time at Wild Oats Marketplace, it developed a strategic partnership with Walmart. Previously, he served in roles of the Chairman of the board of directors and Chief Executive Officer at Blockbuster, where he helped Blockbuster survive the financial market collapse in 2008 through a successful restructuring and sale to Dish Networks. Prior to that, Mr. Keyes spent over 20 years in executive roles at 7-Eleven, Inc., including as Global President and Chief Executive Officer from 2000 to 2005. Mr. Keyes also served in various roles at CITGO Petroleum and Gulf Oil Corporation. Mr. Keyes also served as a member of the board of directors of Andretti Acquisition Corp. Mr. Keyes received a Master of Business Administration from Columbia Business School and a Bachelor’s degree from College of the Holy Cross. Mr. Keyes has been awarded with the Horatio Alger Award in 2005 and the Ellis Island Medal of Honor in 2008. Mr. Keyes currently serves on the board of directors for Murphy USA (NYSE: MUSA) and has served on a number of philanthropic boards, including the American Red Cross and the Education is Freedom foundation.

Cassandra S. Lee, 55
Director

Since 2021, Ms. Lee has served as the Chief Audit Executive for AT&T (NYSE: T), where she is responsible for risk assessment, validation of risk mitigation strategies and ensuring that significant business processes are followed across the firm. In her previous role as Chief Financial Officer for AT&T’s Network and Technology Organizations, Ms. Lee was responsible for all financial operations of network construction, engineering and operations, technology development, security operations and global supply chain. She has spent three decades at AT&T, gaining deep experience in all areas of the business. Ms. Lee currently serves on the board of directors of NiSource Inc. (NYSE: NI), a utility company. Ms. Lee also served as a member of the board of directors of Andretti Acquisition Corp. Ms. Lee earned a Bachelor of Professional Accountancy degree from Mississippi State University and is a member of the Mississippi Society of Certified Public Accountants. Ms. Lee served in the Mississippi Army National Guard and is a U.S. Army Veteran.

Gerald D. Putnam, 66
Director

Since July 2020, Mr. Putnam has been a member of the board of directors of MIYO Health, a technology company providing mental health solutions. He also has served as a member of the board of directors of Product Ventures, Ltd., a brand design company since June 2024. Mr. Putnam also served as a member of the board of directors of Andretti Acquisition Corp. Mr. Putnam served as the Chairman of the board of directors and Chief Executive Officer of TruMarx Data Partners Inc. from 2011 to 2012. Prior to that, he was the Senior Advisor of Corporate Strategy, Technology Integration and Derivative Products of NYSE Euronext Inc. from 2007 until 2008 and the President and Co-Chief Operating Officer of NYSE Euronext Inc. from 2006 to 2007. Prior to the merger of NYSE Group, Inc. and Euronext, Mr. Putnam was the President and Co-Chief Operating Officer of NYSE Group, Inc. from 2006 to 2007. A highly successful entrepreneur, he founded Archipelago Holdings, an electronic communications network, in 1997. Mr. Putnam served as the Chief Executive Officer and the Chairman of the board of directors of Archipelago Holdings, leading a $150 million initial public offering in 2004 and the sale of the company to the NYSE in 2006 for approximately $9 billion. Before founding Archipelago Holdings, Mr. Putnam founded Terra Nova Financial, LLC and served as the President from 1994 until 1999. He has served on multiple boards of directors, including Securities Industry Automation Corporation, OptionsHouse LLC, Greenplum, Inc., FX Alliance, LLC, TruMarx Data Partners, Inc. and MediaCrossing. In recognition of his many accomplishments, Mr. Putnam was selected as one of Time Magazine’s innovators of the 21st century and was a recipient of the Chicago Innovation Visionary Award. Mr. Putnam received his undergraduate degree from The Wharton School of the University of Pennsylvania.

John J. Romanelli, 66
Director

He is an experienced corporate finance executive with transactional and client coverage experience, and has advised boards of directors, chief executive officers and chief financial officers on a wide variety of strategic and financial matters. Mr. Romanelli is skilled with respect to initial public offerings, acquisition financing, messaging and investor relations and strategic transactions. Additionally, he possesses a keen understanding of participants in the special purpose acquisition companies market and public company governance and responsibilities. Mr. Romanelli currently serves as a member of the Advisory Board of #1 Cochran Group, an automobile retail company. Since 2007, Mr. Romanelli has served as the Founder and Managing Partner at Seahawk Advisory Corp., an advisory boutique firm. He has advised private and public companies on a variety of strategic and financial transactions, including restructuring, M&A, investor relations strategies, growth capital and strategies, capital structure and strategic alternatives. At Seahawk Advisory Corp. Mr. Romanelli worked on a wide range of issues and transactions with Mr. Sandbrook, including numerous acquisitions. Prior to Seahawk Advisory Corp., Mr. Romanelli was a Senior Managing Director in the Strategic Finance group at Bear Stearns & Co., and he spent over 20 years in investment banking at Bear Stearns & Co., The First Boston Corporation/Credit Suisse First Boston and Prudential-Bache Securities. Mr. Romanelli also served as a member of the board of directors of Andretti Acquisition Corp. Mr. Romanelli holds a Master of Business Administration in Finance from The Wharton School at the University of Pennsylvania and a Bachelor of Business Administration in Finance from the University of Notre Dame. He is also a Co-Founder of the Connacht Whiskey Company, based in Ireland.