Management Team

Robert J. Wills, Ph.D.
Executive Chairman

Rob Wills

Dr. Wills joined GTx as Executive Chairman of the Board of Directors and as the Chairman of the Board’s Scientific and Development Committee on March 2, 2015. Prior to joining GTx, Dr. Wills served as Vice President, Alliance Manager for Johnson & Johnson, or J&J, and was responsible for managing strategic alliances for J&J’s Pharmaceutical Group worldwide since 2002. Prior to this, Dr. Wills spent 22 years in pharmaceutical drug development, 12 of which were at J&J and 10 of which were at Hoffmann-La Roche Inc. Before assuming his alliance management role at J&J, Dr. Wills served as Senior Vice President Global Development at J&J where he was responsible for its late stage development pipeline and was a member of several internal commercial and research and development operating boards.

Dr. Wills holds a B.S. in Biochemistry and a M.S. in Pharmaceutics from the University of Wisconsin and a Ph.D. in Pharmaceutics from the University of Texas.

Marc S. Hanover
Chief Executive Officer

Marc Hanover

Mr. Hanover, a co-founder of GTx and our Chief Executive Officer, served as our President and Chief Operating Officer from our inception in September 1997 until his appointment as our permanent Chief Executive Officer in February 2015. Marc also served as our acting Principal Financial Officer from December 2013 until his appointment as our interim Chief Executive Officer in April 2014. Mr. Hanover also previously served as a member of our Board of Directors from our inception until August 2011. Prior to joining GTx, Mr. Hanover was a founder of Equity Partners International, Inc., a private equity firm in Memphis, Tennessee, and participated as a founder and investor in three healthcare companies. From 1985 to 1997, Mr. Hanover was a Senior Vice President and a member of the Executive Management Committee of National Bank of Commerce in Memphis, Tennessee.Mr. Hanover holds a B.S. in Biology from the University of Memphis and a MBA in Finance from the University of Memphis.

Diane C. Young, M.D.
Vice President, Chief Medical Officer

Diane Young

Dr. Young was appointed Vice President and Chief Medical Officer at GTx in July 2015. Dr. Young is a board-certified medical oncologist with 25 years of industry experience in clinical development and medical affairs, most recently with Novartis where she spent 12 years in global and regional leadership roles in oncology drug development. Prior to Novartis, Dr. Young spent 10 years with Johnson & Johnson, where she served as Vice President, Global Development at R. W. Johnson Pharmaceutical Research Institute (now Johnson & Johnson Research and Development). At Novartis, Dr. Young held senior leadership positions involved in the development, regulatory approval and medical affairs activities for several products, including Glivec®, Zometa®, Femara®, Sandostatin®, Tasigna®, Jakavi® and Afinitor®, all of which are treatments or supportive therapies for cancer patients.

Dr. Young received her medical degree from the Harvard Medical School, followed by an internship and residency at Johns Hopkins Hospital and Vanderbilt University Hospital. Thereafter, she served as an oncology fellow at the Dana-Farber Cancer Institute. Dr. Young earned an A.B. in Biochemical Sciences (Magna Cum Laude) from Harvard University.

Henry P. Doggrell
Vice President, Chief Legal Officer and Secretary

Henry Doggrell

Mr. Doggrell currently serves as our Vice President, Chief Legal Officer and Secretary, after joining GTx in October 2001 as General Counsel and Secretary. From April 1998 to August 2001, Mr. Doggrell was Senior Vice President, Corporate Affairs at Buckeye Technologies, Inc., a specialty cellulose company, where he was responsible for matters including corporate finance, investor relations, mergers and acquisitions, intellectual property and licensing and strategic development. From 1996 to 1998, Mr. Doggrell served as General Counsel and Secretary of Buckeye Technologies. Prior to joining Buckeye Technologies, Mr. Doggrell was a partner of the Baker, Donelson, Bearman, Caldwell & Berkowitz law firm from 1988 to 1996, where he served as a member of the law firm management committee and Chair of the firm’s Corporate Securities department.

Mr. Doggrell holds a B.S. in Commerce from the University of Virginia and a J.D. from Vanderbilt University.

Mary Ann (Mayzie) Johnston, Pharm.D.
Vice President, Clinical Development

Mayzie Johnston

Dr. Johnston was appointed Vice President, Medical Affairs in November 2012 and currently serves as Vice President of Clinical Development. Dr. Johnston oversees all clinical programs and is the therapeutic lead for the development of GTx-024 in breast cancer. Prior to joining GTx, Dr. Johnston held leadership positions in medical affairs at Actelion and Aventis.

Dr. Johnston holds a Doctor of Pharmacy degree from Samford University McWhorter School of Pharmacy and completed a postdoctoral residency at the Department of Veterans Affairs Medical Center Tuscaloosa, Alabama.

Jeff G. Hesselberg
Vice President, Regulatory Affairs

Jeff Hesselberg

Mr. Hesselberg was appointed Vice President, Regulatory Affairs in May 2007. He joined GTx from ICOS Corporation, where from 1996 to May 2007 he served as Manager, Associate Director, and then Director of Regulatory Affairs. Most recently, Mr. Hesselberg worked on the successful development, launch and commercialization of Cialis® (tadalafil) for the treatment of erectile dysfunction. From 1984 to 1996, Mr. Hesselberg worked for Immunex Corporation and the Puget Sound Blood Center.

Mr. Hesselberg holds a B.S. in Molecular Biology from the University of Wisconsin–Madison and a MBA from the University of Washington.