Management Team

Executive Chairman and Chairman of the Board of Directors

William J. (Bill) Sandbrook has served as our Executive Chairman and the Chairman of the board of directors since May 2024. 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. Mr. Sandbrook is well-qualified to serve as a director due to having over twenty-five years of operational leadership experience, including significant experience as a Chief Executive Officer and experience as a public company board member.

Chief Executive Officer

William M. (Matt) Brown has served as our Chief Executive Officer and Principal Financial and Accounting Officer since May 2024. 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.

Special Advisor and Director

Michael M. Andretti will serve as a special advisor to us following the completion of this offering and has served as a member of our board of directors since May 2024. 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^®️.

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. Mr. Andretti is well-qualified to serve as a director due to his experience in founding and leading businesses, including as a Chief Executive Officer, as well as his knowledge of the automotive and motorsport sectors and his history of pursuing the integration of new technologies in motorsports.

Special Advisor

Mario Andretti is a legendary figure in the history of motor sports. He took the checkered flag 111 times during his career – a career that stretched five decades across six continents. In Indy car competition alone, he is the all-time record holder for race starts with 407. The all-time lap leader with 7,587. And all-time leader in Indy car pole positions won with 67. His 52 IndyCar victories is second on the all-time list. He’s been inducted into 20 Halls of Fame and remains the only driver to have achieved the racing trifecta: winning the Daytona 500 in 1967, Indy 500 in 1969, and the Formula One World Championship in 1978. He’s a four-time IndyCar season champion, and a winner of the IROC title, National Dirt Track Championship and a three-time winner of the 12 Hours of Sebring.

In recognition of his achievements, Mario was knighted by his native Italy as Commendatore and the Library of Congress in Washington, DC honored him as one of its Living Legends.

Mario retired from active competition at the end of 1994 but still remains active in motor sports, driving the two-seater at many Indy Car races and giving rides to journalists, VIPS and celebrities. He works with Bridgestone/Firestone and MagnaFlow as spokesman. He is Vice Chairman of the Andretti Winery, serves as a partner in a West Coast petroleum business, and has his name on the Mario Andretti Racing Experience and Andretti Indoor Karting & Games.