TWA Leadership

TWA Officers

TWA Executive Committee

TWA Board of Directors

TWA Statewide Committees


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TWA Officers


President - Tom Vandivier

Tom has been a member of TWA since 1995 and currently serves as the current President of TWA, Chair of Deer Management Committee, Chair of the Permanent Building Committee and he is current member of the TWA executive committee. He is also a current member of the TYHP Advisory Board, TPWD White-tailed Deer Advisory Committee and Upper Llano Rivers Watershed Protection Plan Committee.

Tom has served as the past Vice-President, Treasurer, Chair of Finance Committee, member of TPWD CWD Stakeholder Group, member of TAHC CWD Working Group, and past member TPWD Managed Lands Deer Permit Advisory Committee.

Tom earned his BBA from Southwestern University, Georgetown, Texas with majors in business and economics, as well as his JD Degree from The University of Houston School of Law. He is now retired from his law practice in Austin, Texas after 38 years of practice in estate and real estate matters, and is the owner of Llano Springs Ranch in Junction, Texas where he has received the 2007 Lone Star Land Steward Award recipient. Tom is also a 2008 Leopold Conservation Award recipient.

Tom and his wife, Sonja, live in Austin, Texas and have two children, Laura and Jessica, and two grandchildren, Lukas and Kaleb.

Vice-President - Sarah Biedenharn

Sarah has been a member of TWA most of her life.  She was a South Texas Buckskin Brigade Cadet in 2007 and has more recently been involved in TWA as a member of the Executive Committee, Conservation Legacy Committee, Membership Committee and Co-Chair of the Convention Committee. She is also a current member of the TPWD White-tailed Deer Advisory Committee and serves on the Board of Directors of the Texas Agricultural Land Trust.

Sarah grew up in a cattle ranching family in Sabinal, where she developed a passion for land and wildlife conservation. She now lives in San Antonio with her husband, Tucker Biedenharn, but still enjoys spending time at the ranch when possible. She graduated from Texas Christian University in 2014 with majors in Finance and Accounting before spending two years with the Hospitality Asset Management division of Goldman Sachs. She is now the San Antonio Head of Real Estate for Sonder, a San Francisco based alternative hospitality company.


Treasurer - Jonathan Letz

Jonathan has been a member of TWA since 2010 and a member of the Executive Committee for the past 8 years. He has been active working on legislative and water issues and currently serves as Chair of the Landscape Working Group for the new headquarters building.

He is a graduate of the University of Texas at Austin with degrees in Business (1979) and Petroleum Land Management (1981). He worked for Exxon Corporation from1981 to 1988. In 1988, he moved back to Kerr County where his family has lived in the Comfort area for over six generations.    

Jonathan lives on his family ranch outside of Comfort with his wife, Karen, and their two sons, Sam (15) and Gus (13).  Cherry Creek Ranch was the recipient of the Lone Star Land Steward Award in 2002. In 2013, the ranch received the Wildlife Conservation award for Region II from the Soil and Water Conservation Districts of Texas. He has worked with Texas Parks and Wildlife Department, University of Texas, U. S. Department of Agriculture, Texas A & M University and other entities on scientific and land stewardship projects.

In 1996, he was elected Kerr County Commissioner of Precinct #3 and is currently serving his 23rd year.  In 1998, Jonathan Letz was appointed to the Plateau Water Planning Group – Region J. He has served as chair since 1998. Commissioner Letz has worked extensively on county subdivision rules and statewide water issues.  

His family raises cattle and manages a white-tailed deer hunting operation. Other business interests include Southwest Turf and Irrigation, a full service landscape, irrigation and land management company and The Garden Haus, a retail nursery and garden center located in Comfort.

Second Vice President for Programs - Dr. Louis Harveson

Dr. Louis Harveson serves as Second Vice President for Programs of the Texas Wildlife Association.

Dr. Harveson was first elected Second Vice President for Programs on July 12, 2013. 

As Second Vice President for Programs, Dr. Harveson serves as an Officer contact and representative for all organizational education program efforts, and he serves as an organizational liaison and resource in matters relating to wildlife and/or natural resource research at the university and college level and with state and federal agencies.

Dr. Harveson is the Dan Allen Hughes, Jr., Endowed Director of the Borderlands Research Institute for Natural Resource Management at Sul Ross State University in Alpine, Texas. The Borderlands Research Institute focuses on assisting landowners and managers of west Texas in managing the natural resources they have been entrusted with. 

Dr. Harveson is a Professor of Wildlife Management at the university. Dr. Harveson’s specialization is Big Game Ecology and Management, Predator-Prey Dynamics, and Upland Gamebird Ecology.

Dr. Harveson is a 4th generation Texan and is a native of Fort Worth. He is a graduate of Texas Tech University (B.S., Wildlife Management, 1991), Texas A&M University-Kingsville (M.S., Range and Wildlife Management, 1995), and Texas A&M University (Ph.D., Wildlife Science, 1997).

Dr. Harveson is a Certified Wildlife Biologist and is a member of The Wildlife Society, Texas Chapter of The Wildlife Society, and various conservation and hunting organizations

Dr. Harveson and his wife Patricia live in Alpine with their daughter Katie and son Jake.


TWA Executive Committee

The Texas Wildlife Association Executive Committee is appointed by the President. All members of the Executive Committee must be Voting Members of the Association. 

The Executive Committee governs all actions and sets all policy of the Association and may exercise all of the powers of the Board of Directors in the interim period between meetings of the Board of Directors. The Executive Committee has full power over all business as conducted by the Officers of the Association, and the Officers are responsible to this Committee. 

Members of the current Executive Committee are:

J. David Anderson, Houston
Marko Barrett , San Antonio
Sarah Biedenharn, San Antonio
Tucker Biedenharn, San Antonio
Tina Buford, Harlingen
Linda Campbell, Kyle
Jim Cathey, College Station
Charles Davidson, San Antonio
Dave Delaney, Kingsville
Parley Dixon, Driftwood
Doug DuBois, Austin
Jonny Fitzsimons, San Antonio
Louis  Harveson, Alpine
Anson Howard, Dallas
Mark Kidd, Houston
Bill Knolle, Austin
Brad Knolle, San Antonio
Jim Kolkhorst, Brenham
Jonathan Letz , Comfort
Nyle Maxwell, Round Rock
Mary Pearl Meuth, College Station
Carl Ray Polk, Lufkin
Bruce Roberts, Kingsville
Jenny Sanders, Angelina
Greg Simons, San Angelo
Don Steinbach, Brenham
Derik Stokes, Willis
David Synatzske, Sandia
Tamara Trail, Albany
Tom Vandivier, Austin
Rex Webb, Austin
Neal Wilkins, San Antonio
Craig Williams, Austin
Carl Young, Georgetown
David Zimmerman, Houston

TWA Board of Directors

The affairs of the Texas Wildlife Association are managed by the Board of Directors. Only Voting Members of the Association serve as Directors. Each of the eight TWA regions has at least five representatives on the Board of Directors. The number of Directors is set by the Executive Committee. Each Director serves a term of three years, and there is not a limit on the number of terms a Director may serve.

Directors are divided into two categories, Active Directors and Directors Emeritus. Directors Emeritus are nominated by the sitting Executive Committee and are granted such status by the Executive Committee.

Directors Emeritus have the same rights and privileges, but not the obligations, of Active Directors. Directors Emeritus are required to be at least Active Members in good standing and have shown outstanding service to the organization, above and beyond the call of duty. To qualify for Director Emeritus status, a Director must have either served as an Officer of the organization for eight years, or served as a director of the organization for nine years, or have been a founding member of the organization.

Directors Emeritus

Hefner Appling, El Campo
Marko Barrett, San Antonio
Richard Bennett, San Antonio
Mark Bivins, Amarillo
McLean Bowman, San Antonio
Rob Bracken, Selma
Fred Bryant, Kingsville
Christine Buford, Harlingen
Richard Butler, Karnes City
Susan Combs, Austin
Charles Davidson, San Antonio
Ed Dutch, Marble Falls
Derry Gardner, San Antonio
Luke Kellogg, San Antonio
Wallace Klussmann, Fredericksburg
Steve Lewis, San Antonio
Gary Machen, Pearsall
Keith Martin, San Antonio
Dan McBride, Burnet
Paul McSween, San Antonio
Daniel Pedrotti, Sr., Corpus Christi
Murphy Ray, Somerset
Randy Rehmann, Austin
Wallace Rogers, San Antonio
Dale Rollins, San Angelo
Charles Schreiner, Salado
Greg Simons, San Angelo
Don Steinbach, Burton
A.M. "Mac" Stringfellow, San Antonio
David Synatzske, Sandia
Jimmie Thurmond, San Antonio
Arthur Uhl, San Angelo
Larry Weishuhn, Uvalde

Honorary Directors Emeritus

James L. "Jaimie" Hayne Jr., San Antonio (Past President)
A.C. "Dick" Jones IV, Corpus Christi

Directors Terms Expiring 2020

Curtis Anderson, Houston
J. David Anderson, Houston
Thomas Arnim, San Antonio
Ty Bartoskewitz, Breckenridge
Tom Beard, Alpine
Warren Blesh, Goldthwaite
Randy Cadwallader, San Antonio
Linda Campbell, Kyle
James Cathey, College Station
Cary Dietzmann, Brenham
Robert Dullnig, San Antonio
Scott Esse, Goldthwaite
Justin Field, St. Cloud
Dan Flournoy, Houston
Joel Glass, Laredo
Jackie Harker, Houston
Steven Harker, Houston
Stephen Hill, Dallas
William R Howell, College Station
Randall Hudson, Fort Worth
Mason King, Fort Worth
Ricardo Longoria, Laredo
Steven Mafrige, Tilden
Robert McFarlane, Tennessee Colony
Gary Meade, Harlingen
MaryPearl Meuth, College Station
James Oliver, San Antonio
Jason Parrish, Austin
Jeremy Peters, Boerne
Scott Petty, San Antonio
Bryan Pickens, Dallas
Mike Reynolds, Austin
Carroll Schubert, San Antonio
Jay Timmins, Brownwood
Tom Vandivier, Austin
Bryan Wagner, Fort Worth
Bill Walker, Seguin
Clayton Wolter, Boerne

Directors Terms Expiring 2021

John Baker, Spring
Connard Barker, Montgomery
James Barrow, San Antonio
Kenneth Bell, Spring Branch
Albert Biedenharn, San Antonio
Sarah Biedenharn, San Antonio
Al Bisbey, George West
Craig Bowen, Dripping Springs
Johnny Braniff, Houston
Ruben Cantu, San Angelo
William Carrington, San Antonio
Chuck Cashdollar, Spring
Ken Cearley, Amarillo
Deborah Clark, Henrietta
Vannie Collins, McAllen 
Kevin Comiskey, Houston
Mark Connally, Jr., San Antonio
Matthew Cooley, Houston
Keith Crawford, Austin
David DeLaney, Kingsville
Parley Dixon, Driftwood
Steve Dutton, San Antonio
Jonny Fitzsimons, San Antonio
Fay Fitzsimons Walker, Houston
Donnie Frels, Rockport
Chaz Glace, Round Rock
Chuck Greco, San Antonio
Jeff Hanselka, La Vernia
Rebecca Heidelberg, Midland
Rod Hench, Hermleigh
Mark Hiler, College Station
Roger Hill, San Antonio
Peter John Holt, San Antonio
Anson Howard, Dallas
Amanda Hurst, Fulshear
Mark Kidd, Houston
Dan Kinsel, Cotulla
Karl Kinsel, San Antonio
Brad Knolle, Bulverde
William Knolle, Austin
Jim Kolkhorst, Brenham
Bart Koontz, San Antonio
Keith Lake, Bandera
Richard "Spencer" Lewis, Dallas 
Ben Love, Marathon
M Russell Marshall, Victoria
Mike Martinez, Fresno
Con Mims, Uvalde
Rick Nauert, Austin
William Osborn, San Antonio
John Park, San Antonio
Jay Robertson, San Antonio
Wallace Rogers, San Antonio
John Russell, San Antonio
Michael Sasser, Beeville
Tim Taylor, Spring
Jim Thompson, Austin
James Uhl, San Angelo
Crystal Watts, Boerne
David Watts, Boerne
Rex Webb, Austin
Jeff White, Midland
Craig Williams, Austin
William Wilson, Houston
Brad Wolfe, Brownsville

Directors Terms Expiring 2022

Andy Allen, Boerne
Terry Anderson, Martinsville
Ernest Angelo, Midland
Katharine Armstrong Love, Austin
Bradford Barnes, Fort Worth
Warren Bluntzer, Lometa
Lamar Brown, Austin
E. A. "Bud" Christy, San Antonio
Jason Cross, San Angelo
Alan Curry, San Angelo
Ernie Davis, Cotulla
Doug DuBois, Austin
Bill Eikenhorst, Brenham 
Edward Farmer, Cedar Park
Selma Glasscock, Sinton
Carlos Gonzalez, Alpine
Milton Greeson, Victoria
Cecario "CG" Guerrero, Pearland
Louis Harveson, Alpine
Elliott Hayne, San Antonio
Brian Hays, Ardmore
David Hewitt, Kingsville
Richard Hill, Austin
George "Timo" Hixon, San Antonio
W.H. "Bill" Hoffmann, Eastland
Lee Hoffpauir, Lampasas
Corey Howell, Weimar
Johnnie Hudman, Albany
Parker Johnson, Houston
William Jones III, Corpus Christi
Kyle Kacal, College Station
Harrison King, Austin
Tucker Knight, Houston
Jonathan Letz, Comfort
Robert Lindsey, Goldthwaite
Ryan Luna, Alpine
Walter "Monty" Martin, Cypress
Mark Matthews, Hondo
Nyle Maxwell, Georgetown
Heath McBride, Brady
Justin McCelvey, San Antonio
Guy McCrary, Midland
Blake Murden, Westlake Hills
Clint Orms, Ingram
Larry Pierce, Overton
Carl Polk, Lufkin
Sue Price, Blooming Grove
Russell Rehmann, Johnson City
Jenny Sanders, Lufkin
Matthew Schnupp, Pennsylvania
Kevin Smithhart, Lufkin
Misty Sumner, Van Horn
Tamara Trail, Albany
Karla Welch, Hebbronville
Neal Wilkins, San Antonio
William Wright, Cisco
William "Carl" Young, Georgetown
Max Yzaguirre, Austin
David Zimmerman, Houston


TWA Statewide Committees

Conservation Legacy Committee

The TWA Conservation Legacy Advisory Committee (CLAC) is formed to provide advice and recommendations to the TWA Executive Committee on the range of issues and topics necessary for implementing high-impact education programs. 

Staff Contact: Kassi Scheffer-Geeslin (kscheffer@texas-wildlife.org)


Deer and Exotic Management Committee

The TWA Deer and Exotic Management Committee is formed to provide advice and recommendations to the TWA Executive Committee on the range of legislative, regulatory, and non-regulatory issues and topics involving whitetail deer, mule deer, pronghorn antelope, and bighorn sheep management in Texas.  

Staff Contact: David Brimager (dbrimager@texas-wildlife.org)


Wildlife Conservation Committee

The Wildlife Conservation Committee (WCC) is formed to provide advice and recommendations to the TWA Executive Committee on a range of legislative, regulatory, and non-regulatory issues and topics involving game (not to include white-tailed deer, desert big game species and other exotic deer species) and nongame wildlife, fisheries and rare species in the State of Texas. 

Staff contact: Iliana Pena (ipena@texas-wildlife.org)  


Texas Big Game Awards Committee 

The TBGA Advisory Committee is formed to provide advice and recommendations to the TWA Executive Committee and Texas Parks and Wildlife Department on all aspects related to the Texas Big Game Awards program. 

Staff contact: Kara Starr (kstarr@texas-wildlife.org


Finance Committee

The TWA Finance Committee is formed to provide advice and recommendations to the TWA Executive Committee on the range of issues and topics necessary to achieve the organization’s financial goals. 

Staff Contact: David Yeates (dyeates@texas-wildlife.org)


Legislative Committee

The TWA Legislative Committee is formed to provide advice and recommendations to the TWA Executive Committee on the range of issues and topics necessary to achieve the organization’s public policy goals (both legislative and regulatory) at the state and federal levels. 

Staff Contact: Daivid Yeates (dyeates@texas-wildlife.org)


Membership Committee

The TWA Membership Committee is formed to provide advice and recommendations to the TWA Executive Committee on the issues and topics necessary to achieve the organization’s membership and regional development goals.

Staff Contact: Kristin Parma (kparma@texas-wildlife.org)


TYHP Advisory Committee

The TWA TYHP Advisory Committee (TYHPAC) is formed to collaboratively work with the TWA Executive Committee to oversee the direction of the Texas Youth Hunting Program (including, without limitation, the administration and financing of the youth hunting program, or similar mutually agreed programs).  TYHP is a co-sponsored initiative of the Texas Parks and Wildlife Department, Texas Wildlife Association, and Texas Wildlife Association Foundation, Inc. that is established as a program to consolidate youth hunting outreach and information in Texas.   

Staff Contact: Chris Mitchell (cmitchell@texas-wildlife.org)


Women of the Land Committee

The TWA Women of the Land (WOTL) Advisory Committee is formed to provide advice and recommendations to the TWA Conservation Legacy Staff, Conservation Legacy Advisory Committee and the TWA Executive Committee on a range of issues and topics necessary to support a land ethic that achieves natural resource literacy through the WOTL program and other outreach programs/activities relevant to the mission of WOTL.

Staff Contact: Iliana Pena (ipena@texas-wildlife.org)


Convention Committee

The TWA Convention Committee is formed to provide advice and recommendations to the TWA Executive Committee on fundraising aspects and event related to TWA’s annual convention held each summer.

Staff contact: David Brimager (dbrimager@texas-wildlife.org)

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