Phuong was selected as an assistant coach for the Inaugural Big Ten Volleyball Foreign Tour in 2014, when he accompanied  student-athletes from all Big Ten schools on a tour through Europe. The team competed against various national teams, including Slovenia, Hungary, Croatia and Italy and hosted a youth volleyball clinic, in addition to community outreach activities.

Phuong helped lead the DePaul Blue Demons to a historic season in 2013, as the squad finished with its most wins since the 2001 slate. DePaul opened the season with a 13-0 mark to establish a new program record for most consecutive victories to begin a campaign. Additionally, several Blue Demons earned individual BIG EAST conference honors, while the team as a whole posted its best marks in recent years in various statistical categories.

Prior to arriving in Chicago, Phuong had stints at Gardner-Webb University (2006-2011), East Tennessee State University (2003-2006), the University of Wyoming (2000-2002), Northeastern University (1998-2000), Wentworth Institute of Technology (1998-2000) and the University of New Hampshire (1996-1998).

At Division III Wentworth, he served as the head coach of the men's volleyball team, leading the squad to the 1999 North East Collegiate Volleyball Association Conference Championship. Additionally, he guided Wentworth to a No. 11 ranking in the American Volleyball Coaches Association national poll during the 2000 campaign, marking the Leopard's highest rank in program history.

Phuong has also held several roles as a coach at the high school and club level, in addition to serving as a head court coach and camp technician at various institutions' summer camps. A 1995 graduate of Ferris State University in Michigan, he was a four-year member of his alma mater's men's club volleyball team.