After playing two seasons in Hartford, Schellscheidt became the head coach of the New Jersey Americans in 1977 winning another league title that season.[3] He also coached in the North American Soccer League[4] and in 1975 became coach of the United States national team. He also led the U.S. team in the 1984 Olympics qualifying. However, Schellscheidt was replaced four months before the start of the tournament, with a record of nine wins, 14 losses and 11 ties, by Alketas Panagoulias. The departure was contentious, with Schellscheidt saying of Gene Edwards, the USSF president at the time, "[he] told me they couldn't afford two coaches. That's funny, because they hadn't been paying me recently."[5]
In 1988, Schellscheidt was named coach of the Seton Hall University men's team.[6] The Pirates initially experienced success under Schellscheidt,[7] winning two Big East championships, eight NCAA tournament berths, seven conference title game appearances and a trip to the NCAA Sweet 16 in 2001 while having had only one losing season during his first eighteen seasons at the helm. The Pirates, however, have not been successful recently, posting losing records in 2007, 2008, 2009, and 2010 consecutively. Schellscheidt stepped down as the coach of Seton Hall on November 28, 2011.[8]