Dan Sullivan
President/Chief Executive Officer

  • Juris Doctorate, University of Tulsa College of Law
  • Bachelor of Science in Business Administration, Northeastern State University
  • Oklahoma State Representative (District 71), 2004 – 2011
  • Of Counsel, Pierce Couch, Hendrickson, Baysinger & Green LLP, 2005 – 2011
  • Joined GRDA in 2011

Tim Brown
Chief Operating Officer

  • Bachelor of Science in Mechanical Engineering, University of Maine
  • Registered Professional Engineer
  • Background in Power Supply Planning, Power Marketing, T&D Operations, Corporate Planning and Regulatory Affairs
  • Joined GRDA in 2011

Brian Edwards
Executive Vice President/Chief of Law Enforcement & Lake Operations

  • 38-plus years in law enforcement
  • Bachelor Degree in Criminal Justice/Corrections, Langston University 1995
  • Master of Business Administration, Oklahoma City University, 2003
  • Served eight years as Tulsa County Under-Sheriff
  • Graduate of 219th Section of Federal Bureau of Investigation National Academy
  • Joined GRDA in 2012

Heath Lofton
General Counsel

  • Juris Doctorate, University of Oklahoma
  • Bachelor of Science in Accounting, Oklahoma State University
  • Joined GRDA in 2011

Nathan Reese
Executive Vice President/External Relations

  • Juris Doctorate, Washington University
  • Bachelor of Arts in Political Science, University of Tulsa
  • Joined GRDA in 2013

Carolyn Vowell Dougherty
Interim Executive Vice President/Chief Financial Officer

  • 34-plus years in finance, utility accounting
  • Certified Public Accountant
  • Bachelor’s degree in accounting, Oklahoma State University
  • Previous GRDA experience, 1986-2017 (returned as interim in May 2023)

Laura D. Hunter
Executive Vice President/Chief Administrative Officer

  • Master of Human Relations, University of Oklahoma
  • 20+ years progressive experience in strategic planning, human resources, information technology and properties.
  • Joined GRDA in 2019

John Wiscaver
Executive Vice President/Strategic Communications

  • Bachelor of Science, Communications and Marketing, Eastern Illinois University
  • 25+ years experience in public relations/media/marketing/crisis management
  • Joined GRDA in 2017