2024 Board of Directors

The TWGGA Board of Directors is the governing body of the association, setting strategic policy, providing general oversight, and actively pursuing association goals. The Board of Directors meets three times a year. The meetings are open to the public. Guidelines for visitors can be found here.

To suggest agenda items for the board’s consideration, make remarks to the board, or provide feedback regarding association operations and policy to your regional directors, please contact office@twgga.org.


Executive Committee


John Matthews 
Cassaro Winery & Vineyard

Past President

Monty Dixon 
Bar Z Winery


Julie Herbort 
Grape Creek Vineyards/Heath Sparkling Wines 


Karen Bonarrigo
Messina Hof Estate Winery 


Meredith Eaton
Firelight Vineyards

Directors at Large

Roxanne Myers
Lost Oak Winery

Bob Landon
Landon Winery

Joe Riddle 
Uva Morado Vineyards

Regional Directors

Region 1

High Plains

Jim Irwin
Cerro Santo Vineyards
Winery Director

Ty Wilmeth
The Triple D Winery
Vineyard Director

Region 2

North Texas

Mark Rogers 
Marker Cellars
Winery Director

Dr. Fred Cummings 
Edge of the Lake Vineyard
Vineyard Director

Region 3

Gulf Coast

Diane Lynn Zimmerman
Teysha Vineyards
Winery Director

Ricardo Rubiano
Rubiano Vineyards
Vineyard Director

Region 4

West Texas

Kalyn Hodges
Los Nopales Wines
Winery Director

Bart Neff
Christoval Winery
Vineyard Director

Region 5

Hill Country

Sammy Lam
Wanderlust Wine Co.
Winery Director

Bryan Chagoly
Sandy Road Vineyards
Vineyard Director