HF Sinclair Corporation announced the appointment of Atanas H. Atanasov as Executive Vice President, effective September 30, 2022. Mr. Atanasov currently serves as Chief Financial Officer of Lummus Technology LLC. Prior to joining Lummus, Mr. Atanasov served as the Executive Vice President, Chief Financial Officer and Treasurer of Kraton Corporation, from May 2019 until its merger with DL Holdings in March 2022.

Prior to joining Kraton, he served as the Chief Financial Officer of Empire Petroleum Partners, LLC, 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, 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. Richard L. Voliva III, who served as Executive Vice President and Chief Financial Officer of the company agreed to a mutual separation with the company effective September 15, 2022.