Alex T. Krueger – Chairman . Alex Krueger has served as our Chairman since January 2021. Mr. Krueger is President and Chief Executive Officer of First Reserve which he joined in June 1999. He is responsible for overall investment, asset management, strategic planning, and operations of First Reserve and its funds, as well as leading its internal ESG Group. Prior to joining First Reserve, Mr. Krueger worked in the energy group of Donaldson, Lufkin & Jenrette in Houston. Mr. Krueger serves or has served on the board of directors of various First Reserve portfolio companies or affiliates, including most recently, Ascent Resources, LLC, and IOG Resources, LLC. Additionally, Mr. Krueger currently serves on the Advisory Boards of BlackRock Global Energy & Power Infrastructure Fund I and Fund II and Blue Bear Capital, LLC. Mr. Krueger holds B.S. degrees in Chemical Engineering and Finance and Statistics from the University of Pennsylvania.

We believe that Mr. Krueger’s considerable investment, asset management, strategic planning and operational experience, as well as his experience on the boards of First Reserve portfolio companies and affiliates, bring important and valuable skills to our Board of Directors.

Gary D. Reaves – Director . Gary Reaves has been a member of our Board of Directors since January 2021. Mr. Reaves is a Managing Director of First Reserve, which he joined in 2006. Mr. Reaves’s primary responsibilities include investment origination, execution and exit, focusing on midstream infrastructure and logistics assets and the equipment, manufacturing and services businesses focused on midstream and downstream infrastructure and other industrial end markets. Mr. Reaves also works closely with Mr. Krueger, Mr. Wizel and the other senior members of the First Reserve team on overall investment strategy, portfolio management, talent development and strategic planning for First Reserve. Prior to joining First Reserve, Mr. Reaves was an Analyst in the Global Energy Group at UBS Investment Bank. He also spent time as an Analyst in Financial Advisory Services for Howard Frazier Barker Elliot, Inc. Mr. Reaves serves or has served on the board of directors of various First Reserve portfolio companies or affiliates, including: USA DeBusk, IRISNDT Inspection & Engineering Inc., Lamons, LineStar Integrity Services, Eagle Infrastructure Services, Refuel, Blue Racer Midstream, LLC, Crestwood Equity Partners LP (NYSE: CEQP), and Petroshale Inc. (TSXV: PSH). Mr. Reaves holds a B.B.A. from the University of Texas.

We believe that Mr. Reaves’s considerable experience with investment origination, execution and strategy, as well as his experience on the boards of First Reserve portfolio companies and affiliates, including several of the companies through which First Reserve is progressing sustainability and ESG-related growth strategies, bring important and valuable skills to our Board of Directors.

Neil A. Wizel – Chief Executive Officer and Director . Neil Wizel has served as our Chief Executive Officer and a member of our Board of Directors since January 2021. Mr. Wizel is a Managing Director of First Reserve, which he joined in 2007. Mr. Wizel’s primary responsibilities include investment origination, execution and exit, focusing on infrastructure and logistics/distribution assets and industrial service and manufacturing companies, all within the energy value chain. Mr. Wizel also works closely with Mr. Krueger, Mr. Reaves and the other senior members of the First Reserve team on overall investment strategy, portfolio management, talent development and strategic planning for First Reserve. Prior to joining First Reserve, Mr. Wizel was a member of the Investment Staff at Greenbriar Equity Group, a private equity firm with a focus on business services and advanced manufacturing in select industrial sectors. Prior to Greenbriar, he was a Financial Analyst in the Leveraged Finance/Financial Sponsor Group at Credit Suisse First Boston. Mr. Wizel serves or has served on the board of directors of various First Reserve portfolio companies or affiliates, including several of the companies through which First Reserve is progressing sustainability and ESG-related growth strategies, most notably Hoover Circular Solutions, Refuel and Lamons. Mr. Wizel holds a B.A. from Emory University.

We believe that Mr. Wizel’s considerable experience with investment origination, execution and strategy within the energy value chain, as well as his experience on the boards of First Reserve portfolio companies and affiliates, including several of the companies through which First Reserve is progressing sustainability and ESG-related growth strategies, bring important and valuable skills to our Board of Directors.

Thomas S. Amburgey – Chief Financial Officer and Director . Thomas Amburgey has served as our Chief Financial Officer and Director since January 2021. Mr. Amburgey is a Director of First Reserve, which he joined in 2012. During his time at First Reserve, Mr. Amburgey has been focused on investing across the global energy value chain, with particular emphasis on critical infrastructure and value-added equipment, manufacturing and services, and is currently responsible for helping lead First Reserve’s investment initiatives across sustainability and energy transition as well as its internal ESG Group. Mr. Amburgey serves or has served on the board of directors of various First Reserve portfolio companies or affiliates, including several of the companies through which First Reserve is progressing sustainability and ESG-related growth strategies, most notably Lamons. Prior to joining First Reserve, he was an Analyst in the Financial Sponsors and Leveraged Finance division at UBS Investment Bank. Mr. Amburgey holds a B.B.A. and a Master of Accountancy from the University of Georgia.

We believe that Mr. Amburgey’s experience helping to lead First Reserve’s investment initiatives across sustainability and energy transition as well as its internal ESG Group, as well as his experience on the boards of First Reserve portfolio companies and affiliates, bring important and valuable skills to our Board of Directors.