Board of Directors 2023-2024

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 and/or to make remarks to the board, please contact

Please provide feedback regarding Association operations and policy to your regional directors by contacting

2023 Board Meetings

February 21, 2023, 9:00 a.m.–1:30 p.m.
Embassy Suites San Marcos, 1001 E McCarty Ln., San Marcos, Texas 78666
In-Person Only

June 8, 2023, 10:00 a.m.
Texas Wine Collective, 10354 US-290, Fredericksburg, TX 78624
In-Person Only

More dates to come.


Executive Committee


Monty Dixon 
Bar Z Winery

Past President

Glena Yates 
Spicewood Vineyards

President Elect

John Matthews 
Cassaro Winery & Vineyard


Karen Bonarrigo
Messina Hof Estate Winery 


Julie Herbort 
Grape Creek Vineyards/Heath Sparkling Wines 

Directors at Large

Roxanne Myers
Lost Oak Winery

Meredith Eaton
Firelight Vineyards

Joe Riddle 
Uva Morado Vineyards

Regional Directors

Region 1

High Plains

Jim Irwin
Cerro Santo Vineyards

Ty Wilmeth
The Triple D Winery

Region 2

North Texas

Mark Rogers 
Marker Cellars

Dr. Fred Cummings 
Edge of the Lake Vineyard

Region 3

Gulf Coast

Diane Lynn Zimmerman
Teysha Vineyards 

Ricardo Rubiano
Rubiano Vineyards 

Region 4

West Texas

Kalyn Hodges
Los Nopales Wines

Bart Neff
Christoval Winery

Region 5

Hill Country

Jason Englert
Grape Creek Vineyards/Heath Sparkling Wines 

Barbara Lecouna
Siboney Cellars