About
Andrew Clark has a 25 year career spanning many facets of the technology and energy business. Andrew is a founder and principal with The Castell Group, LLC, an investment and advisory firm assisting companies in the technology business while making investments at both ends of the risk curve from short-term arbitrage to long-term venture investing. In addition, Andrew is currently president of the Houston Angel Network, where he has invested in numerous companies spanning across a broad range of industries such as consumer products, internet-enabled businesses, enterprise software, cleantech, and life sciences. In several of these investments he serves on the board, advisory board, or as a board observer. Andrew also currently serves as an Entrepreneur-in-Residence with the Houston Technology Center. Previously, Andrew was an executive at Reliant Energy, where he helped transition the company to a fully deregulated electricity market. While at Reliant, Andrew was responsible for all in
Position in the VCSift Database
- • 2,490 investors hold the Founder role in VCSift. Andrew Clark is one of them.
Data sourced from 410,343 investor profiles. Updated July 2026.
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