Immediately attending St. John's University on a full scholarship, Michaelsen played and starred in every game and led the team in points ever since.
In his senior season, he was named a National Strength and Conditioning Association (NSCA) All-American, earned the Francis A. McCall Memorial Award as the team MVP and also became the fifth player in St. John's history to reach 100 career points and first player since the reinstatement in 2004 to surpass 100 point.
[4] Michaelsen ended his professional career after playing with the NY Lizards in the MLL and as a member of the Swarm in 2009.
He is the founder of 365Lax Inc, a company that provides lacrosse-specific services all year round for both boys and girls in grades 12 and under.
Michaelsen is also the co-founder of the US Academy of Lacrosse, a sports complex located in Farmingdale, New York[5]