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, Engineering and Technical Services

Mark T. Cunningham was appointed Senior Vice President, Engineering and Technical Services of HLS in July 2016. He previously served as 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.

Matthew P. Clifton , , , Chairman of the Board

Director Since:

July 2004

Principal Occupation:

Chairman of the Board

Business Experience:

Matthew P. Clifton has served as Chairman of the Board, in a non-employee capacity, since February 2014. Mr. Clifton previously served as Executive Chairman of Holly Logistic Services, L.L.C. from January 2014 until his retirement in February 2014, as Chairman of the Board and Chief Executive Officer from March 2004 through December 2013 and as President from July 2011 to November 2012. Mr. Clifton joined Holly Corporation in 1980 and served as the Executive Chairman of HollyFrontier Corporation from July 2011 through December 2012. Mr. Clifton previously served as Chief Executive Officer of Holly Corporation from 2006 until the merger in July 2011, as Chairman of the Board of Holly Corporation from April 2007 until the merger in July 2011 and as President of Holly Corporation from 1995 until 2006.

Additional Directorships:

Mr. Clifton served as a director of HFC from 1995 through December 2012.

Larry R. Baldwin , , , Retired

Director since:

May 2016

Principal Occupation:

Retired

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.

George J. Damiris , , , Chief Executive Officer and President of Holly Logistic Services, L.L.C., Chief Executive Officer and President of HollyFrontier Corporation

Director since:

February 2016

Principal Occupation:

Chief Executive Officer and President of Holly Logistic Services, L.L.C., Chief Executive Officer and President of HollyFrontier Corporation

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.

Charles M. Darling , , IV , , President of DQ Holdings, L.L.C.

Director Since:

July 2004

Principal Occupation:

President of DQ Holdings, L.L.C.

Mr. Darling has served as President of DQ Holdings, L.L.C., a venture capital investment and consulting firm focused primarily on opportunities in the energy industry and on the development and sale of medical devices and other manufactured products, since August 1998. Mr. Darling was previously the General Manager of Desert Power, LP and of its General Partner, Desert Power, LLC, which was an indirect affiliate of DQ Holdings, LLC. Mr. Darling also previously practiced law at the law firm of Baker Botts, L.L.P. for over 20 years.

Michael C. Jennings , , , Chairman of the Board of HollyFrontier Corporation

Director Since:

October 2011

Principal Occupation:

Chairman of the Board of HollyFrontier Corporation

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 the Executive Chairman and a director 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 the merger in July 2011 and as a director of Frontier Oil Corporation from 2008 until the merger in July 2011.

Jerry W. Pinkerton , , , Retired

Director Since:

July 2004

Principal Occupation:

Retired

Business Experience:

Mr. Pinkerton retired in December 2003. From December 2000 to December 2003, Mr. Pinkerton served as a consultant to TXU Corp. (now Vista Energy) and from August 1997 to December 2000, Mr. Pinkerton served as Controller of TXU Corp. and its U.S. subsidiaries. Mr. Pinkerton previously served as the Vice President and Chief Accounting Officer of ENSERCH Corporation and was employed for 26 years as an auditor by Deloitte Haskins & Sells, a predecessor firm of Deloitte & Touche, LLP, including 15 years as an audit partner.

Additional Directorships:

Since April 2012, Mr. Pinkerton serves on the board of directors of Southcross Energy Partners GP, LLC, the general partner of Southcross Energy Partners, L.P., and serves as the chair of the audit and conflicts committees of the board of directors of Southcross Energy Partners GP, LLC. Mr. Pinkerton served on the board of directors of Animal Health International, Inc., and served as chair of its audit committee, from May 2008 to June 2011.

William P. Stengel , , , Retired

Director Since:

July 2004

Principal Occupation:

Retired

Business Experience:

Mr. Stengel retired from Citigroup/Citibank, N.A. in May 2003. From 1997 to May 2003, Mr. Stengel served as Managing Director and Senior Credit Officer of the global energy and mining group at Citigroup/Citibank, N.A.

James G. Townsend , , , Member of the New Mexico House of Representatives

Director Since:

January 2012

Principal Occupation:

Member of the New Mexico House of Representatives

Business Experience:

Mr. Townsend has served as a member of the New Mexico House of Representatives since January 2015. Mr. Townsend retired from HFC in December 2011. He was employed by Holly Corporation (and HFC) and/or HLS for more than 25 years. From 2008 until his retirement, Mr. Townsend served as Senior Vice President of UNEV Pipeline, LLC, a joint venture between Sinclair Oil Corporation and a subsidiary of HEP. Mr. Townsend served as Vice President, Operations for HLS from 2004 to 2007 and was responsible for all pipeline and terminal operations for Holly Corporation prior to the formation of HEP. Prior to such time, Mr. Townsend served in positions of increasing seniority at Holly Corporation.