Atanas H. Atanasov

Mr. Atanasov has served as Executive Vice President and Chief Financial Officer since September 2022. Prior to joining HF Sinclair, 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, 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 and as the Chief Financial Officer of Empire Petroleum Partners, LLC, a wholesale distributor of motor fuels, from February 2016 to May 2019. Prior to then, Mr. Atanasov 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, he held various finance roles of increasing responsibility with GE Capital from January 2003 to November 2011. He is a registered Certified Public Accountant.