George J. Damiris , , , Chief Executive Officer and President

George J. Damiris was appointed Chief Executive Officer in November 2016 and President in February 2017. He has served as Chief Executive Officer and President of HollyFrontier Corporation since January 2016. He previously served as Executive Vice President and Chief Operating Officer of HollyFrontier Corporation from September 2014 until January 2016 and as Senior Vice President, Supply and Marketing of HollyFrontier Corporation from January 2008 until September 2014. Mr. Damiris joined HollyFrontier Corporation in 2007 as Vice President, Corporate Development after an 18-year career with Koch Industries, where he was responsible for managing various refining, chemical, trading, and financial businesses.

Richard L. Voliva III , , , Executive Vice President and Chief Financial Officer

Richard L. Voliva III was appointed as Executive Vice President and Chief Financial Officer of HLS in March 2017. He also serves as Executive Vice President and Chief Financial Officer of HFC since March 2017. Mr. Voliva served as Senior Vice President and Chief Financial Officer of HLS from July 2016 to March 2017, Vice President and Chief Financial Officer of HLS from October 2015 until July 2016, Vice President, Corporate Development of HLS from February 2015 until October 2015 and as Senior Director, Business Development of HLS from April 2014 until February 2015. Mr. Voliva also served as Senior Vice President, Strategy for HFC from June 2016 to March 2017. Prior to joining HLS, Mr. Voliva was an analyst at Millennium Management LLC, an institutional asset manager, from April 2011 until April 2014, an analyst at Partner Fund Management, L.P., a hedge fund, from March 2008 until March 2011 and Vice President, Equity Research at Deutsche Bank from June 2005 to March 2008. Mr. Voliva is a CFA Charterholder.

Mark T. Cunningham , , , Senior Vice President, Operations and Engineering

Mark T. Cunningham was appointed Senior Vice President, Operations and Engineering of HLS in January 2018. Mr. Cunningham previously served as Senior Vice President, Engineering and Technical Services from July 2016 to January 2018, Senior Vice President, Operations from January 2013 to July 2016 and Vice President, Operations from July 2007 to January 2013. He served Holly Corporation as Senior Manager of Special Projects from December 2006 through June 2007 and as Senior Manager of Integrity Management and Environmental, Health and Safety from July 2004 through December 2006. Prior to joining Holly Corporation, Mr. Cunningham served Diamond Shamrock/Ultramar Diamond Shamrock for 20 years in several engineering and pipeline operations capacities.

Denise C. McWatters , , , Senior Vice President, General Counsel and Secretary

Denise C. McWatters was appointed Senior Vice President, General Counsel and Secretary in January 2013. Ms. McWatters also serves in a similar capacity for HFC. Ms. McWatters previously served as Vice President, General Counsel and Secretary from April 2008 until January 2013. She joined Holly Corporation in October 2007 with more than 20 years of legal experience and served as Deputy General Counsel until April 2008 and as Vice President, General Counsel and Secretary from April 2008 until January 2013. Ms. McWatters served as the General Counsel of The Beck Group from 2005 through 2007. Prior to joining The Beck Group, Ms. McWatters practiced law in various capacities at the Law Offices of Denise McWatters, the predecessor firm to Locke Lord Bissell & Liddell LLP, the legal department at Citigroup, N.A., and the law firm of Cox Smith Matthews Incorporated.

Michael C. Jennings , , , Chairman of the Board

Director Since:

2011

Business Experience:

Mr. Jennings served as Chief Executive Officer of HLS from January 2014 to November 2016 and as President of HLS from October 2015 to February 2016. Mr. Jennings has served as Chairman of the Board of HFC since January 2017, a position he previously held from January 2013 until January 2016. Mr. Jennings served as Executive Chairman of HFC since from January 2016 until January 2017 and as the Chief Executive Officer and President of HFC from the merger of Holly Corporation and Frontier Oil Corporation in July 2011 until January 2016. Mr. Jennings previously served as the President and Chief Executive Officer of Frontier Oil Corporation from 2009 until the merger in July 2011 and as the Executive Vice President and Chief Financial Officer of Frontier Oil Corporation from 2005 until 2009.

Additional Directorships:

Mr. Jennings currently serves as Chairman of the Board of HFC and a director of ION Geophysical Corporation. Mr. Jennings served as Chairman of the board of directors of Frontier Oil Corporation from 2010 until July 2011 and as a director of Frontier Oil Corporation from 2008 until July 2011.

George J. Damiris , , , Chief Executive Officer and President

Director since:

2016

Business Experience:

George J. Damiris was appointed Chief Executive Officer in November 2016 and President in February 2017. He has served as Chief Executive Officer and President of HollyFrontier Corporation since January 2016. He previously served as Executive Vice President and Chief Operating Officer of HollyFrontier Corporation from September 2014 until January 2016 and as Senior Vice President, Supply and Marketing of HollyFrontier Corporation from January 2008 until September 2014. Mr. Damiris joined HollyFrontier Corporation in 2007 as Vice President, Corporate Development after an 18-year career with Koch Industries, where he was responsible for managing various refining, chemical, trading, and financial businesses.

Additional Directorships:

Mr. Damiris has served on the Board of Directors of HFC since December 2015 and on the Board of Directors of Eagle Materials Inc. since September 2016.

Larry R. Baldwin , ,

Director since:

2016

Business Experience:

Larry R. Baldwin was employed for 41 years as an auditor by Deloitte LLP and predecessor firms, including 31 years as a partner, prior to retiring from such position in May 2015. While he was a partner at Deloitte LLP, Mr. Baldwin held a number of practice management positions.

Christine B. LaFollette , ,

Director Since:

2018

Business Experience:

Ms. LaFollette has served as a partner at Akin Gump Strauss Hauer & Feld LLP since June 2004. Prior to that, Ms. LaFollette served as a partner at King & Spalding LLP from 1997 to June 2004, as a partner at Andrews & Kurth LLP from 1987 to 1997 and as an associate at Andrews & Kurth LLP from 1980 to 1987.

James H. Lee , ,

Director Since:

2017

Business Experience:

Mr. Lee has served as the Managing General Partner of Lee, Hite & Wisda Ltd., a private company with investments in oil and gas working, royalty and mineral interests, since founding the firm in 1984.

Additional Directorships:

Mr. Lee currently serves as a director of HFC. He served as a director of Frontier Oil Corporation from 2000 until July 2011 and as a director of Forest Oil Corporation from 1991 until December 2014.

Eric L. Mattson , ,

Director Since:

2018

Business Experience:

Mr. Mattson served as Executive Vice President, Finance of Select Energy Services, Inc., a provider of total water solutions to the U.S. unconventional oil and gas industry, from November 2016 until his retirement in March 2018 and served as Executive Vice President and Chief Financial Officer of Select Energy Services, Inc. from November 2008 through January 2016. Prior to that, Mr. Mattson served as Senior Vice President and Chief Financial Officer of VeriCenter, Inc., a private provider of managed hosting services, from 2003 until its acquisition in August, 2007. Mr. Mattson worked as an independent consultant from November 2002 to October 2003. Mr. Mattson served as the Chief Financial Officer of Netrail, Inc., a private Internet backbone and broadband service provider, from September 1999 until November 2002. From July 1993 until May 1999, Mr. Mattson served as Senior Vice President and Chief Financial Officer of Baker Hughes Incorporated, a provider of products and services to the oil, gas and process industries. Mr. Mattson joined Baker International, Inc. in 1980, and served in a number of capacities, including Treasurer, prior to the merger of Baker International, Inc. and Hughes Tool Company in 1987, at which time he became Vice President and Treasurer of Baker Hughes, Inc., a position he held until 1993.

Additional Directorships:

Mr. Mattson has served as a director of National Oilwell Varco, Inc. since March 2005 (having served as a director of Varco (and its predecessor, Tuboscope Inc.) from January 1994 until its merger with National Oilwell Varco in March 2005) and as a director of Rex Energy Corporation since April 2010.