McLain Southworth is the founder and managing partner of Haven Ventures, bringing over 12 years of hands-on experience as an entrepreneur and operator across fintech, digital health, and frontier technology before becoming an investor. His background includes being an early employee at pioneering foreign-exchange platform Currenex and later working on fintech innovation at State Street Bank after its acquisition, plus early training at top-tier seed fund SV Angel while at Stanford.

• Active championing of portfolio companies and founders who demonstrate strong execution capabilities. He frequently broadcasts fundraise announcements and milestones for startups he backs, such as when he praised the hustle of the Jeeves team regarding their global payments solution or celebrated the fundraising efforts of VoltaCircuit and Peaze.
• Strong professional alignment and collaboration with his wife, who is also a venture capitalist. He actively promotes her work, notably expressing pride when she led a funding round for Gameto during a major personal life event and sharing excitement for the official launch of her fund, OverwaterVC.
• Interest in emerging technology ecosystems outside of Silicon Valley, specifically highlighting developments in New Mexico. He shared enthusiasm for the innovation happening in Albuquerque after co-hosting the Converge ABQ event with partners like Coinbase and OrangeDAO.
• Appreciation for sports and premium spirits, which could serve as rapport-building topics. He has tweeted support for teams like the San Francisco Giants and the Washington Commanders, formerly the Redskins, and specifically complimented Mitcher's 20-year single barrel bourbon as a standout drink.