To date, Marsh has led SwimMAC to three consecutive USA club excellence championships, a first for any program, outdistancing the second-place finisher by 12,000 points (see www.usaswimming.org).
He was the head swim coach for University of California San Diego, an NCAA Division II program for two seasons from 2017 to 2019.
In December 2016 Marsh was named the ‘Professional Adviser’ of the Israel Swimming Association, with a goal of preparing the country's swimmers for the Tokyo 2020 Olympics.
SwimMAC athletes such as Aaron Ciarla, Daniel Slocki, and Catherine Caldwell have been a key part of the championship program we have built at Auburn.
I look forward to joining the quality coaching staff at this club and working with the coaches, athletes, and parents to build a championship program in Charlotte.”[This quote needs a citation] In 2016 Marsh and Team Elite placed Anthony Ervin, Ryan Lochte, Cammille Adams, Kathleen Baker, Jimmy Feigen, and Katie Meili on the US Olympic Team.
In late 2016, the board decided to move forward without Marsh as CEO and agreed to work to redefine his and Team Elite's role at the club.
[5] Marsh stated: "I will do all I can to uphold the unmatched tradition of excellence that has been established by the swimmers and coaches from the previous Olympic Games.