Ezra Uzi Yemin has served as the Chief Executive Officer and Chairman of the Board of our general partner since April 2012 and as president of our general partner since August 2019. Mr. Yemin has served as Chief Executive Officer of Delek since June 2004 and as President and a director of Delek since April 2001. He was appointed to be the chairman of the board of directors of Delek in December 2012 and has also served at the chairman of the board of directors of Alon USA Energy, Inc. (NYSE: ALJ) since May 2015. Mr. Yemin also served as Delek's treasurer from April 2001 to November 2003 and as Delek's secretary from May 2001 to August 2005. The Board believes that, because he has worked for Delek since its founding, Mr. Yemin brings to the Board a thorough and complete understanding of our business, operations and operating environment, as well as that of Delek (the owner of approximately 62.7% of our units and the customer on whom the Partnership is most dependent). Mr. Yemin also brings to the Board substantial leadership, planning and industry experience.
Mr. Spiegel has served as our Chief Financial Officer since May 2020, and as a member of the Board of our general partner since July 2014, as a member of the Audit Committee and Conflicts Committee since September 2014 and as a member of the EHS Committee since its inception in October 2016. Prior to joining the Board, Mr. Spiegel served as Chief Executive Officer of Israel Discount Bank Ltd. (TASE: DSCT) from 2011 through 2014 where he had previously held the position of Executive Vice President from 2001 through 2005. Mr. Spiegel also served as Chief Executive Officer of IDB Bank of NY from 2006 to 2010. He also has experience as an executive in the real estate industry.
Denise C. McWatters has served as the Executive Vice President, General Counsel and Corporate Secretary of Delek US Holdings, Inc. and Delek Logistics Partners, LP since February 2021. Ms. McWatters previously served as the general counsel, chief compliance officer and corporate secretary of HollyFrontier Corporation, an independent petroleum refiner (NYSE:HFC), and of the general partner of Holly Energy Partners, L.P. (NYSE:HEP) from May 2008 until August 2019. Prior to joining HollyFrontier, Ms. McWatters served as the general counsel of The Beck Group, an architecture, construction and design firm, from 2005 through October 2007.
Jared Paul Serff has served as an Executive Vice President since May 2017 and a Vice President since July 2015. He has also been an executive vice president of Delek Logistics GP, LLC since May 2017 and a vice president of Delek Logistics GP, LLC since July 2015. Prior to joining us, Mr. Serff was the chief human resources officer of Itron, Inc. (NASDQ: ITRI) from July 2004 to February 2014. Itron is a publicly-traded technology company offering products and services in energy and water resource management. Mr. Serff’s responsibilities at Itron included overseeing the global human resources function supporting approximately 10,000 employees operating in 60 countries around the world.
Prior to joining Delek in 2021, Mr. O’Malley served as a special advisor to a number of private equity and public company CEO’s and boards regarding corporate strategy, M&A/divestments, financial structuring, and commercial optimization. He has previously held C-suite positions at Citizens Companies (President and CEO), Gulf Oil (EVP and Chief Commercial Officer), PBF Logistics (President), and PBF Energy (SVP and Chief Commercial Officer). He has also worked extensively in the investment banking, hedge fund, commodity trading, and electric and natural gas sectors. He holds an undergraduate degree from Colgate University (Cum Laude) and an MBA from Thunderbird School of Global Management.