Atanas H. Atanasov has served as Executive Vice President and Chief Financial Officer of the Company since September 2022. Prior to joining the Company, Mr. Atanasov served as Chief Financial Officer of Lummus Technology LLC, a global chemical technologies company for the petrochemical and energy industries, from April 2022 to September 2022. Prior to joining Lummus, he served as the Executive Vice President, Chief Financial Officer and Treasurer of Kraton Corporation, a NYSE listed specialty chemical company, from May 2019 until its merger with DL Holdings in March 2022. Prior to joining Kraton, Mr. Atanasov served as the Chief Financial Officer of Empire Petroleum Partners, LLC, a wholesale distributor of motor fuels, from February 2016 to May 2019. Prior to joining Empire, he served as Executive Vice President, Chief Financial Officer and Treasurer of NGL Energy Partners LP, a NYSE listed MLP, from May 2013 to February 2016, as Senior Vice President, Finance and Treasurer from September 2012 to May 2013 and as Vice President and Treasurer from November 2011 to September 2012. Prior to joining NGL, Mr. Atanasov held various finance roles of increasing responsibility with GE Capital from January 2003 to November 2011. He is a registered Certified Public Accountant.

Steven C. Ledbetter has served as Executive Vice President, Commercial of the Company since March 2023. Prior to the joining the Company, Mr. Ledbetter served as Director, President and Chief Executive Officer of Shell Midstream Partners GP LLC, the general partner of Shell Midstream Partners, L.P., from March 2021 to March 2023, where he was responsible for the vision, strategy and execution of the Shell Midstream business. Prior to then, he served as Vice President, Commercial of Shell Midstream from April 2018 to March 2021, where he was responsible for business development, joint ventures, oil movements and portfolio activity. Prior to then, Mr. Ledbetter served as the President and Chief Executive Officer of Jiffy Lube International from October 2013 to February 2018, a wholly owned subsidiary of Shell, where he was responsible for the vision, strategy, growth and profitability of the Jiffy Lube brand and network. He first joined Shell in 1999 and held various roles of increasing responsibility in the areas of finance, commercial deal structuring, operations management, strategy and business transformation during his 24 years at Shell.

Mr. Joyce joined the lubricants and specialties segment of the Company in March 2023. Prior to joining, Mr. Joyce served in various leadership positions at The Lubrizol Corporation from 1995 to March 2023. During this time, Mr. Joyce held expatriate roles based in London and Tokyo, and most recently served as Vice President, Corporate Ventures from July 2020 to March 2023 and Vice President, Global Sales and Marketing, from June 2016 to June 2020.

Director Since:

2017

Age: 67

Business Experience:

Ms. Ainsworth served as President and Chief Executive Officer of the general partner of Oiltanking Partners, L.P. and of Oiltanking Holding Americas, Inc., companies engaged in the terminaling, storage and transportation by pipeline of crude oil, refined petroleum products and liquefied petroleum gas, from 2012 until her retirement in 2014, Senior Vice President, Manufacturing of Sunoco Inc. from 2009 to 2012, and General Manager of the Motiva Enterprises, LLC Norco, Louisiana Refinery from 2006 to 2009. Prior to joining Motiva, Ms. Ainsworth served in various capacities at Royal Dutch Shell. Ms. Ainsworth is a graduate of the Institute of Corporate Directors Education Program (Rotman School of Management, University of Toronto and Haskayne School of Business, University of Calgary) and holds the ICD.D. designation.

Additional Directorships:

Ms. Ainsworth currently serves as a director of Pembina Pipeline Corporation, Archrock, Inc. and Kirby Corporation.

Director Since: 2009

Age: 68

Business Experience:

Mr. Echols served as Executive Vice President and Chief Financial Officer of Centex Corporation from 2000 until his retirement in 2006. Before joining Centex, Mr. Echols held various positions, including managing partner, at Arthur Andersen LLP from 1978 until 2000.

Additional Directorships:

Mr. Echols currently serves as a director of Trinity Industries, Inc. and EnLink Midstream Manager, LLC, the managing member of EnLink Midstream, LLC. Prior to the closing of the January 2019 simplification transaction between EnLink Midstream Partners, LP (formerly known as Crosstex Energy, L.P.), Mr. Echols served on the board of EnLink Midstream GP, LLC, the general partner of EnLink Midstream Partners, LP.  

Director Since: 2023

Age: 57

Business Experience:

Mr. Go has served as Chief Executive Officer and President since May 2023. He previously served as President and Chief Operating Officer from November 2021 to May 2023 and as Executive Vice President, Chief Operating Officer from June 2020 to November 2021. Prior to joining the Company, he served as Chief Executive Officer of the general partner of Calumet Specialty Products Partners, L.P., an independent producer of specialty hydrocarbon products, from January 2016 to April 2020 and retired from Calumet in June 2020. Prior to joining Calumet, Mr. Go served in various leadership roles at Koch Industries, Inc. and Flint Hills Resources, LP, a wholly-owned subsidiary of Koch Industries, Inc. from August 2008 to September 2015, including having most recently served as Vice President, Operations of Flint Hills Resources, LP from July 2012 to September 2015. Prior to joining Koch Industries, Mr. Go held various roles of increasing responsibility in downstream operations during his 18 years at ExxonMobil Corporation.

Additional Directorships:

Mr. Go currently serves as a director of Celanese Corporation.

Director Since: 2024

Age: 61

Business Experience:

Ms. Johns served as Chief Executive Officer and as a Managing Director of Incitec Pivot Ltd., an Australian listed multinational manufacturer and distributor of fertilizers, civil explosives and chemicals, from November 2017 until June 2023. Prior to joining Incitec, Ms. Johns held several executive leadership roles in the U.S., UK/Europe and Asia/China during her 30 years with BP plc, including serving as Head of Safety & Operational Risk, Downstream from 2011 until 2015, Head of BP Group Operating Management System Excellence from 2013 until 2015, President, Asian Olefins and Derivatives from 2008 until 2010, President, BP North America Natural Gas Liquids from 2004 until 2007, Technical Vice President of Health, Safety & Environmental, Manufacturing Excellence, Engineering and Projects, Global Petrochemicals from 2002 until 2003, and Refinery Manager and Business Unit Leader, Toledo Refinery from 1999 until 2001.

Additional Directorships:

Ms. Johns previously served on the board of directors of Incitec Pivot Ltd. from November 2017 until June 2023 in conjunction with her Chief Executive Officer position.  

Director Since: 2011

Age: 72

Business Experience:

Mr. Kostelnik has served as a principal of Glenrock Recovery Partners since January 2012. Glenrock Recovery Partners assists energy, pipeline and terminal companies with maximizing the value of non-fungible liquid hydrocarbons and provides health, safety and environmental compliance and project management consulting services. He served as the President and Chief Executive Officer of Cinatra Clean Technologies, Inc. from 2008 to 2011. Cinatra provides tank cleaning systems to refining pipelines and terminals. Prior to his retirement in 2007, Mr. Kostelnik served in a number of senior positions during his 16 years with CITGO Petroleum Corporation, including as Vice President of Refining. During that time, he was responsible for, among other things, the creation and implementation of the Health, Safety & Environmental Management System as well as environmental compliance and improvement. CITGO is engaged in the refining and marketing of petro-chemical products.

Additional Directorships:

Mr. Kostelnik currently serves as a director of Methanex Corporation. He served as a director of Frontier Oil Corporation from 2010 until the merger of Frontier Oil Corporation and Holly Corporation in July 2011.