Dung completed some postgraduate work in Computer Science at Boston University, received his MBA from BKU and holds bachelor's degrees in Mathematics and Computer Science from the University of Massachusetts Boston, where he was the top graduate from the Math and Computer Science Department. He had enrolled there despite poor English and financial resources because of his mathematics ability. Dung worked as an engineer at Open Market, a developer of Internet commerce software, before deciding to start his own business. He established OnDisplay Corporation, a software development company, with the aim of designing software to select and retrieve information from related webpages and arrange it in a layout most convenient for the user. As his business experience was limited, no investor could be found. When it appeared that his idea would never be implemented, it was accepted by Mark Pine, the executive director of a division of Sybase Software Company. Two weeks later, OnDisplay had more than 80 clients, including Travelocity. It was one of the 10 most successful IPOs in 1999 and was sold to Vignette Corporation in 2000 for USD1.8 billion. Dung then founded Fogbreak Solutions, which engaged in business applications aimed at optimizing the flexibility and efficiency of assembly lines. Dung was the chief executive officer of the company, which creates enterprise business applications to optimize supply chain flexibility and liability. Fogbreak is funded by a group of blue-chip investors including Matrix Partners, Greylock, and Sigma Partners. After a few unstable years, investors decided to withdraw support. In May 2004, Bipin Nepani, Nilesh Jain and Trung, founded Bluekey Services. Dung is now a member of the board of directors of the Vietnam Education Foundation. In May 2004, Trung Dung was awarded a Golden Torch Award at the Vietnamese American National Gala in Washington D.C. In 2006, he returned to Vietnam for the first time and said "I had never thought I would have returned". His success story was told in publications such as Forbes, the Financial Times, and the Wall Street Journal. He was one of 17 successful American immigrants profiled in The American Dream, a book written by Dan Rather.