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Mr. Brown has served as the President and Chief Executive Officer of the Company and a member of the Board since December 2024. Prior to joining the Company, he served as the Chief Executive Officer of EnerMech, a global energy and infrastructure services company, from 2020 to 2024. During his tenure, he successfully led the company through significant operational change, creating and delivering a new global One EnerMech strategy, which included diversifying the business into new high growth end markets. From 2011 to 2014, Mr. Brown was the Chief Executive Officer and Executive Director of Kentz Engineers & Constructors, a FTSE 250 listed company. Under his leadership, Kentz's revenues grew from $700 million to $3.9 billion, and the company was successfully sold to SNC-Lavalin in 2014. Post-acquisition, he served as President of the Oil & Gas division and Corporate Development Officer at SNC-Lavalin, where he led the $3.8 billion acquisition and integration of Atkins PLC, delivering significant cost savings and operational synergies. Earlier in his career, Mr. Brown held various senior roles at Foster Wheeler Corporation and KBR, where he managed large-scale services and projects businesses within energy and infrastructure across multiple regions, including North America, Europe, Africa, and the Middle East. His strategic leadership and business development skills were instrumental in driving growth and securing major contracts. Mr. Brown holds an MBA from Henley Management College, was awarded a Fellowship from the ECITB, and has a High National Diploma in Mechanical Engineering from the University of Hull.

Ms. Haller has served as a member of the Board since the completion of the Centuri IPO. Ms. Haller also previously served as Chair of the Board from the completion of the Centuri IPO until September 2025. Since May 2022, Ms. Haller has served as a director and the President and Chief Executive Officer of Southwest Gas Holdings and Chief Executive Officer of Southwest Gas Corporation, Southwest Gas Holdings' gas utility. She also serves as a director of Southwest Gas Holdings and several of its operating subsidiaries. Ms. Haller has announced that she will be retiring from her positions as the President and Chief Executive Officer of Southwest Gas Holdings and Chief Executive Officer of Southwest Gas Corporation, effective May 8, 2026, and from her position as director of Southwest Gas Holdings and Southwest Gas Corporation, effective as of the conclusion of Southwest Gas Holdings' annual meeting of stockholders on May 7, 2026, and that she plans to serve as an advisor to Southwest Gas Holdings following her resignation through December 31, 2026. As leader of Southwest Gas Holdings' businesses, Ms. Haller is responsible for improving financial and operational performance, and implementing Southwest Gas Holdings' strategy, growth initiatives and investment plans. Ms. Haller has served in multiple leadership positions during her 29-year tenure with Southwest Gas, most recently serving as Executive Vice President and Chief Legal and Administrative Officer beginning in 2019. She is a member of the State Bars of Arizona, California, and Nevada and the American Gas Association. Ms. Haller serves on the boards of directors of the Legal Aid Center of Southern Nevada, Las Vegas Global Economic Alliance and the American Gas Association and serves as the trustee of American Gas Foundation. She received a B.S. in finance from the University of Wyoming, a J.D. from Cornell Law School, and completed the Finance for Senior Executives program at Harvard Business School.

Mr. Krummel has served as Chair of the Board since September 15, 2025 and has been a member of the Board since the completion of the Centuri IPO. He brings more than 30 years of financial executive experience in the energy and construction industries. Since 2022, Mr. Krummel has served as a founding partner of KEW Advisory LLC (KEW), where Mr. Krummel provides mergers, acquisitions, and sell-side transaction advisory services to energy-focused clients. Prior to founding KEW, Mr. Krummel served as Executive Vice President and Chief Financial Officer of McDermott International Inc. (McDermott) from 2019 to 2021 and Vice President of Finance and Chief Accounting Officer of McDermott from 2016 to 2019, where he was responsible for all finance functions including consolidated financial reporting, SEC filings, financial planning and analysis, investor relations, and information technology. McDermott filed for Chapter 11 bankruptcy protection in January 2020 and successfully emerged from bankruptcy in June 2020. Prior to joining McDermott, Mr. Krummel served as the Vice President and Chief Financial Officer for EnTrans International LLC, a portfolio company of American Industrial Partners LLC. Prior to that, he served as Vice President Finance, Controller and Chief Accounting Officer for Cameron International Corporation (Cameron), where he was responsible for all accounting functions including consolidated financial reporting, SEC filings, budgeting and analysis. Mr. Krummel began working at Cameron in October 2007 and previously served as Chief Financial Officer for Enventure Global Technology, a private equity backed startup. In addition to our Board, Mr. Krummel joined the board of directors of Electric Reliability Council of Texas Inc. (ERCOT) in 2025; ERCOT is the independent system operator for Texas that manages the flow of electric power to more than 27 million Texas customers. In 2024, Mr. Krummel began serving on the board of directors of ACS Partners Holdco LLC, a privately held construction services company. He has also been a member of the board of directors of Rebuilding Together Houston since 2007, becoming its board president in 2026. Mr. Krummel previously served on the board of directors of Eco-stim Energy Solutions from 2014 to 2019 and the board of directors of Rebuilding Together Philadelphia from 2001 to 2003. Mr. Krummel holds a BSBA in accounting from Creighton University and an MBA from The Wharton School of the University of Pennsylvania.

Ms. Dill has served as a member of the Board since the Centuri IPO and served on the Company's advisory board between 2018 and 2024. Ms. Dill has a wealth of experience in the energy sector, having served in a number of executive capacities in the natural gas and power industries. Most recently, Ms. Dill served as the Chief Communications Officer of Spectra Energy Corp. (Spectra) from 2013 until the completion of Spectra's merger with Enbridge, Inc. early in 2017. Previously, Ms. Dill served as the Group Vice President of Strategy for Spectra and the President and CEO of Spectra Energy Partners, LP from 2012 until 2013. Prior to that, Ms. Dill served as President of Union Gas Limited in Ontario, Canada from 2007 to 2011. Over her career, Ms. Dill also served in various financial and operational roles with Duke Energy, Duke Energy International, and Shell Oil Company. Ms. Dill was an independent director of QEP Resources, Inc. from May 2013 to March 2021 and served as a non-executive director of Inter Pipeline Ltd. from May 2018 to August 2021. In May 2018, she joined the board of Rayonier Advanced Materials Inc. (NYSE: RYAM), where she serves as a non-executive director, and in September 2021 she became a non-executive director of Sterling Infrastructure Inc. (NASDAQ: STRL). In April 2019, she joined the board of Southern Star Central Gas Pipeline Company. In addition, she is a member of the Advisory Council for the College of Business and Economics at New Mexico State University and participates on the Community Relations Committee of the board of Memorial Hermann Hospital in Houston, Texas. She was also selected as the Ontario Energy Leader of the Year in 2010, as well as the Distinguished Alumni for the College of Business at New Mexico State University that same year. In Canada, Ms. Dill spent time as chair for both the Canadian Gas Association and the Ontario Energy Association. Ms. Dill represented Canada on the American Gas Association and ran the Safety committee of the AGA. Ms. Dill holds a Bachelor of Administration degree from New Mexico State University and is a graduate of the Harvard Business School Advanced Management Program. Ms. Dill has also earned her CERT Certificate in Cybersecurity from Carnegie Mellon University and received her NACD Directorship Certification.

Mr. Evans has served as a member of the Board since the completion of the Centuri IPO. Mr. Evans is the retired Chief Financial Officer of Southern Company, an electrical and natural gas utility holding company. He served as Chief Financial Officer from 2018 to 2021, with responsibility over investor relations, public reporting, information technology, cybersecurity, business development, and risk and capital deployment. Prior to his tenure at Southern Company, Mr. Evans served as Chairman, President and Chief Executive Officer of AGL Resources, Inc. (AGL), the largest publicly traded gas distribution system in the U.S. During his 15 years at AGL, Mr. Evans served as Treasurer, Chief Financial Officer, and Chief Operating Officer before becoming Chief Executive Officer. Prior to his time at AGL, Mr. Evans worked at the Federal Reserve Bank of Boston, and at Mirant Corp, a global energy provider. Mr. Evans serves on the boards of directors of Georgia Power (a subsidiary of Southern Company (NYSE: SO)), Southwest Gas Holdings (NYSE: SWX), and Air Products and Chemicals, Inc. (NYSE: APD). He is also currently a trustee of Emory University. Mr. Evans has served as chair of several philanthropic organizations, including the Grady Hospital Foundation and Zoo Atlanta.

Ms. Mariucci has served as a member of the Board since the completion of the Centuri IPO and has served on the board of directors of Southwest Gas Holdings since 2006. Ms. Mariucci has over 30 years of experience in finance, construction and real estate development. She currently serves as the General Partner of MFLP, a family office and investment entity. Ms. Mariucci previously had a 28-year career with Del Webb Corporation, culminating in her role as the President of Del Webb following its merger with Pulte Homes, Inc. in 2001 until 2003. She serves as a director of Southwest Gas Holdings (NYSE: SWX) and Taylor Morrison Home Corporation (NYSE: TMHC), and is currently chair of the board of directors of Banner Health, a large nonprofit healthcare system. Ms. Mariucci is on the board of directors of the Arizona State University Foundation and related entities, and currently chairs the Investment Committee of the Arizona State University Endowment. Ms. Mariucci is a past chair of the Arizona Board of Regents, and a past director of CoreCivic, Inc. (NYSE: CXW), Berry Corporation (Nasdaq: BRY), the Arizona State Retirement System, HonorHealth and Action Performance Companies. Ms. Mariucci received her undergraduate degree in accounting and finance from the University of Arizona. She completed the Corporate Financial Management Program at Stanford's Graduate School of Business and has been certified as a CPA and a FINRA Securities Financial and Operations Principal.

Mr. Patton has served as a member of the Board since the completion of the Centuri IPO and has served on the Company's advisory board since September 2018. Mr. Patton is an infrastructure thought leader with more than 39 years of experience. From 2017 until his retirement in July 2022, Mr. Patton served as Executive Vice President-External Affairs at American Electric Power Co., Inc. (AEP). In this role, he led AEP's customer services, communications, regulatory, NERC Compliance, federal public policy, and corporate sustainability organizations. Prior to assuming these responsibilities, Mr. Patton served in numerous executive positions throughout his tenure with AEP, including Executive Vice President - AEP West Utilities, Chief Human Resource Officer, Senior Vice President of Regulatory Policy, and the president and chief operating officer of two AEP subsidiaries: Appalachian Power Company and AEP Texas, each company serving over one million customers in West Virginia, Virginia and Tennessee and South and West Texas, respectively. While at AEP, Mr. Patton was an Executive Sponsor of the Black Employee and Pride Resource Groups. Prior to joining AEP in 2005, Mr. Patton spent approximately 11 years in the energy and telecommunications business with Houston Lighting & Power Company. During his tenure in Texas, Texas Governor George Bush appointed Patton to serve on the Texas Energy Coordination Council and the Interstate Oil and Gas Compact Commission. Later, Governor Rick Perry appointed Mr. Patton to the Texas Energy Planning Council, established to advise the governor on energy matters. Mr. Patton previously served on the boards of the Richmond Federal Reserve Bank, National Association of Manufacturers, United States Energy Association, Sterling Infrastructure, Inc. and Center for Workforce Development. Mr. Patton currently serves as a member of the board of directors of Ameresco, Inc., Messer, Inc., Messer Construction Company and California Water Service Group. Mr. Patton holds a Bachelor's Degree from Bowdoin College and a Master's Degree from the Lyndon B. Johnson School of Public Policy at the University of Texas at Austin.

Mr. DeMaria has served as a member of the Board since November 2025. Mr. DeMaria is a Senior Analyst at Icahn Enterprises L.P. and Icahn Capital LP (collectively with certain affiliates thereof, IEP), which he joined in 2022. Prior to his position at IEP, Mr. DeMaria served as a Director at Zipari, a portfolio company of Thoma Bravo. Prior to Zipari, Mr. DeMaria worked as an investment banking associate at Moelis & Company from 2019 to 2021. Mr. DeMaria has served as a director of CVR Energy, Inc. since March 2024, and Viskase Companies, Inc. since March 2023. IEP, CVR Energy and Viskase are indirectly controlled by Mr. Carl C. Icahn. Mr. DeMaria received a Master of Business Administration from the S. C. Johnson College of Business at Cornell University and a Bachelor of Business Administration from Roanoke College.

On August 11, 2026, the Board of Directors of Centuri Holdings, Inc. appointed Kelly Youngblood as Executive Vice President, Chief Financial Officer effective as of August 12, 2026.Mr. Youngblood, served, following the acquisition of MRC Global Inc. (MRC) by DNOW Inc. (DNOW), as executive advisor to the chief executive officer of DNOW from November 2025 to March 2026. Prior to such acquisition, Mr. Youngblood served as executive vice president and chief financial officer of MRC from March 2020 to November 2025, and executive vice president from November 2019. Prior to joining MRC, Mr. Youngblood served as executive vice president and chief financial officer of BJ Services from December 2017 to November 2019 and prior to that was the senior vice president and chief financial officer at Diamond Offshore Drilling, Inc. from 2016 to 2017. He has also held a variety of finance and accounting positions of increasing responsibility at Halliburton, including vice president of investor relations. Mr. Youngblood is a Certified Public Accountant and received a B.A. in Accounting from Cameron University.

on August 11, 2026, the Board appointed Danielle Hunter as Executive Vice President, Chief Legal & Administrative Officer and Corporate Secretary, effective as of August 12, 2026.Ms. Hunter most recently served as President of Berry Corporation (Berry), formerly a publicly traded upstream energy company, from January 2023 through its acquisition by California Resources Corporation in December 2025. She joined Berry in 2020 as Executive Vice President, General Counsel and Corporate Secretary, a position she held through her appointment as President. Prior to Berry, Ms. Hunter served as Executive Vice President, General Counsel, Chief Risk & Compliance Officer, and Corporate Secretary of C&J Energy Services, Inc., through its acquisition by NexTier Oilfield Solutions Inc. (subsequently acquired by Patterson-UTI Energy, Inc.). Earlier in her career, she practiced corporate law at Vinson & Elkins LLP. Ms. Hunter currently serves on the Board of Directors of KLX Energy Services Holdings, Inc. and holds a Juris Doctor, with honors, from Tulane University Law School.

On March 20, 2026, the Board of Directors of Centuri Holdings, Inc.elected Mr. Steven E. Nielsen as Independent Director. Mr. Nielsen served from 2000 to 2024 as Chairman and Chief Executive Officer of Dycom Industries, a leading provider of specialty contracting services to the telecommunications infrastructure industry. While at Dycom, he led the company through 25 years of transformational growth, scaling the business from under $200 million in revenue to more than $4.5 billion while overseeing a nationwide workforce and complex, multi-market operations. Mr. Nielsen spent 31 years at Dycom Industries, Inc., most recently as Chairman of the Board between 2000 and 2024, and President and Chief Executive Officer from March 1999 to 2024. While there he led Dycom through 25 years of transformational growth, scaling the business from under $200 million in revenue to more than $4.5 billion. He was also previously a director of SBA Communications Corporation. Mr. Nielsen received a Bachelor of Arts degree from Williams College in 1985.

On November 18, 2024, Kendra Chilton, Vice President, Corporate Controller of the Company, was designated as the Company's principal accounting officer, effective immediately. Ms. Chilton, age 37, has served as the Company's Vice President, Corporate Controller since May 2022. Prior to joining the Company, Ms. Chilton held a number of positions at PricewaterhouseCoopers beginning in August 2010, most recently serving as a Director from July 2021 to May 2022. Prior to assuming that position, Ms. Chilton served as an Assurance Manager from June 2016 to June 2019 before being promoted to Assurance Senior Manager, a position she held from July 2019 to June 2021. Ms. Chilton graduated with a B.S. in both Accounting and Finance as well as a master's degree in accountancy from the W.P. Carey School of Business at Arizona State University. Ms. Chilton is also a Certified Public Accountant.