the University of Louisiana at Lafayette. As a result of these and other professional experiences, Mr. Bernard brings extensive breadth, depth and expertise in the oil and natural gas services sector of the energy industry that strengthens the Boards collective qualifications, skills and experience.
Diane K. Duren
, age 59, was appointed to the Board in August 2017. In February 2017, Ms. Duren retired from Union Pacific Corporation, the operator of one of North Americans premier railroad franchises, having served as Executive Vice President, Chief Administrative Officer and Corporate Secretary for four years, after serving as Vice President and General Manager–Chemicals in Marketing & Sales. Since joining Union Pacific in 1985, she held a variety of positions in the Finance and Marketing & Sales departments, including Vice President and General Manager–Agricultural Products. In 2012, Ms. Duren was one of the honorees of the Womens Center for Advancement Tribute to Women. She was recognized by Profiles in Diversity Journal as one of the Women Worth Watching in 2011, and that same year, she was awarded the Creighton University College of Business Alumni Merit Award. In 2008, Ms. Duren was recognized by Pink magazine, a magazine for professional women, as one of the top 15 women in business. Prior to her employment at Union Pacific, she was a certified public accountant with Deloitte, Haskins & Sells in Omaha. Ms. Duren has served as a director of Werner Enterprises (NASDAQ: WERN), a transportation and logistics company, since May 2017. She has been active on multiple community and industry boards including Girl Scouts – Spirit of Nebraska and American Red Cross, of which she served as chair of the Heartland Chapter in 2010 and 2011. In 2014, Ms. Duren was appointed by Omaha Mayor Jean Stothert and reappointed for another five-year term beginning May 2019 by the Omaha City Council to the Metropolitan Entertainment & Convention Authority Board of Directors and is the current Chairwoman of the Board. She also serves on the Board of Childrens Hospital and Medical Center as Chair. Ms. Duren joined the Peter Kiewit Foundation as a community advisor in December 2018. Ms. Duren holds a bachelors degree in Business Administration from Creighton University. Ms. Durens vast experience in the transportation industry, multiple leadership roles, and accounting and financial experience strengthen the Boards collective qualifications, skills and experience.
William J. Kacal
, age 70, has served as a member of the Board since January 2012. Mr. Kacal served as a director of Alon USA Energy, Inc. (NYSE: ALJ), an independent refiner and marketer of petroleum products until June 2017, at which time it was acquired; Integrity Bancshares, Inc., located in Houston, Texas, and its wholly-owned subsidiary, Integrity Bank SSB (Integrity Bank) until May 31, 2018, at which time it was acquired; the National Association of Corporate Directors (NACD) — Texas Tri-Cities Chapter and Goodwill Industries of Houston (Goodwill Houston). Mr. Kacal served on the Audit Committee of Integrity Bank. Mr. Kacal previously served on the Audit Committee of Alon USA Energy, Inc. and served as the Chairman of the Audit Committee of Boy Scouts of America — Sam Houston Area Council, Goodwill Industries International and Goodwill Houston. He also previously served on the Alon USA Energy, Inc. Special Committee. Mr. Kacal has over 40 years of accounting and management experience with Deloitte & Touche LLP (Deloitte), most recently serving as a partner from 1981 until his retirement in May 2011, and prior to that serving as a member of the audit staff from 1970 to 1981. Mr. Kacal also served as a member of the board of directors of Deloitte from 2004 to May 2011 and as a member of the executive committee from 2004 to 2008. During his time with Deloitte, Mr. Kacal worked extensively with companies in the oil and natural gas industry. Mr. Kacal earned a B.B.A. in Accounting from Texas A&M University, is a licensed Certified Public Accountant in Texas and is a NACD Board Leadership Fellow. As a result of these and other professional experiences, Mr. Kacal possesses particular knowledge and experience in accounting, finance and capital structure; strategic planning and leadership of complex organizations; and board practices of other entities that strengthen the Boards collective qualifications, skills and experience.
Charles
W.
Shaver
, age 60, has served as a member of the Board since July 2011 and is currently our Chairman of the Board. Mr. Shaver is currently Chairman and CEO of Nouryon, a global specialty chemicals company located in Amsterdam. Mr. Shaver previously served as the Chairman and Chief Executive Officer of Axalta Coating Systems Ltd. (NYSE: AXTA), a global coatings company, from February 2013 until September 2018, where he now serves as Chairman. Mr. Shaver serves as a member of the board of directors for Atotech, Inc. and previously served as a member of the board of directors of Taminco Inc., a specialty chemicals company, until it was acquired and ceased to be a publicly-traded company. Prior to joining Axalta Coating Systems, Mr. Shaver was an Operating Partner of Golden Gate Capital from April 2011 until December 2012. Prior to joining Golden Gate Capital, Mr. Shaver served as the Chief Executive Officer and President of the TPC Group Inc. from 2004 to April 2011, as a Vice President and General Manager for Gentek, Inc. from 2001 to 2004 and as a Vice President and General Manager for Arch Chemicals, Inc. from 2001 to 2004. Mr. Shaver began his career with The Dow Chemical Company, where he held a series of operational and business positions from 1980 to 1996. Mr. Shaver