Dwight joined Gagnon Securities in 2005 and is a Partner in the firm.

He started his career in 1969 as a research analyst at Goodnow, Gray & Co. In 1972 he joined The Shoreline Group as a general partner. In 1973 Dwight formed First Arbitrage Management Company as a managing partner. In 1980 he joined Robert R. Barker & Co. (later Barker, Lee & Co.) where he was a partner. Dwight has managed Upland Associates since 1995. In 1996 Dwight formed a joint venture investment partnership with Knowlton Brothers, Inc.

Dwight has a BA in Economics and an MBA in Business Administration from Columbia University.