Marissa Topolski Singleton is a Senior Associate at Avante Capital Partners. Based in Houston, Marissa focuses on business development and deal sourcing, as well as evaluating investment opportunities across a variety of sectors. She joined Avante in 2025.
Marissa began her career in investment banking at Tudor, Pickering, Holt & Co., where she advised clients in the energy sector on mergers, acquisitions, and capital markets transactions. She then joined Main Street Capital Corporation as a member of the private credit underwriting team, where she evaluated and structured debt investments across a diverse range of industries.
Marissa earned her B.A. in Cognitive Sciences with a minor in Business from Rice University.
Marissa lives in Houston and enjoys running, traveling, and exploring new restaurants. She especially loves organizing group dinners to try out emerging dining spots across the city.