PRESIDENT
BRYAN CHAGOLY
Bryan Chagoly and his family founded Sandy Road Vineyards in 2016 on their century farm in the Texas Hill Country near Hye, TX. Today they grow 16 acres of Spanish, French and Italian grape varieties and focus on growing boutique Texas wines that showcase the uniqueness of Texas terroir. Prior to becoming a wine grower, Bryan graduated from Texas A&M University and spent his first career in software technology startups in Austin.
VICE PRESIDENT
JANET MIERTSCHIN
Janet’s love of wine began through travel to wine regions around the world. In 2019, she and her husband Mark purchased 28 acres in Hye, Texas, planted seven acres of vines, and began making wine at home with a focus on 100% Texas wine. She further developed her winemaking skills through the Kerrville Hills Winery Incubator Program and completed the Texas Tech Winemakers Certificate Program in 2022.
Portree Cellars opened its Hye tasting room in 2023, and Janet’s wines have earned awards from the San Francisco Chronicle, TEXSOM, Vintners Cup/Texas Monthly Magazine, and the Houston Livestock Show Wine Competition, along with recognition from James Suckling and Cristaldi & Co. Portree Cellars joined Texas Wine Growers in 2025 to support the promotion of 100% Texas wine. Janet was elected Vice President in 2026. Prior to her wine career, Janet held business leadership roles at LyondellBasell and holds a B.S. in Mechanical Engineering from Texas A&M University.
MEMBER AT LARGE / PAST PRESIDENT
JOHN RIVENBURGH
RIVENBURGH WINE and WINE INCUBATOR
John Rivenburgh has been producing high quality Texas wines for nearly two decades. Rivenburgh’s winemaking philosophy is to understand all aspects of the winemaking process, starting with good stewardship of grapes and sustainable farming techniques. John has won dozens of wine awards on the state, national, and international level with multiple Texas brands. He currently owns Kerrville Hills Winery, a tasting room and Texas’ first wine incubator, a communal space for learning low intervention winemaking. He has been very active in leading legislation to advance and protect the Texas wine industry. John has had two Presidencies under Texas Hill Country Wineries, and his iconic motto is Drink Texas, Texas!
TREASURER
TATE GREGORY
Tate is the Director of Vineyards for William Chris Wine Company. He is a graduate of The University of Texas at Austin and began in the Texas wine industry in 2019 after a harvest in Sonoma, CA.
MEMBER AT LARGE
EXECUTIVE DIRECTOR
KELLY OLSON
Kelly is a strategic operations and customer experience leader with a passion for the Texas wine industry. As the Executive Director of Texas Wine Growers, she is committed to advocating for 100% Texas-grown wines and fostering collaboration among Wineries, Growers, and our Advocate members. Kelly brings marketing agency and customer retention expertise to TWG as it continues to grow its membership and industry impact across Texas. She has visited over 70 wineries across Texas (so far)! Kelly is a certified Texas Wine Ambassador and holds a WSET Level 2 with Distinction. She is currently pursuing a Wine Business Certificate from Texas Tech University. When she’s not championing Texas wine, Kelly is a fractional Customer Growth & Retention Leader, helping founders and CEOs at growing agencies, professional services firms, and tech start-ups build post-sales programs to increase customer lifetime value.
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