Zuming Feng has been the USA IMO team coach for many years. We thank Dr. Feng for his great contribution to USA math education!
We are glad that we have a young successor of Honorable Dr. Feng. Dr. Po-Shen Loh lead USA IMO team won the 2015 IMO gold medal.

http://www.maa.org/news/us-team-takes-first-place-at-international-mathematical-olympiad
http://www.math.cmu.edu/~ploh/
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Po-Shen Loh, who is a member of the mathematics faculty at CMU, directs MOSP and leads the USA IMO team. Loh is excited about the success of the six students, and sees the success of the team as an outgrowth of the extended goals of the program. As quoted in an article posted this week on the Simons Foundation website, Loh notes that “the focus of our program should be to recognize that we have 54 of the most impactful high school students in terms of potential, and we should help them be successful long-term.”
— quote from maa.org