Danehy spent the past two seasons at the University of Pennsylvania, first as a video coordinator and then as an assistant coach who primarily worked with the face-off unit and goalkeepers. During that time, he was also the offensive coordinator for the New York Lizards, a Major League Lacrosse squad.

From 2012 to 2014, Danehy served as Michigan's offensive coordinator. During his final season in Ann Arbor, the Wolverines set a program record with 152 goals, which stood until 2017. Danehy also mentored Michigan's first All-ECAC First Team selection, Kyle Jackson, and four All-ECAC Rookie Team honorees.

Danehy broke into collegiate coaching at Dartmouth, his alma mater. After spending his first two seasons as an assistant offensive coordinator, he transitioned to goalie coordinator and assistant defensive coordinator in 2009. He later moved to offensive coordinator and recruiting coordinator in 2011, spending two seasons in those roles. Beyond his on-field and recruiting responsibilities, Danehy played a key role in fundraising and monitoring the educational development of his players.

In June 2017, Danehy was named the President and Chairman of the Turkey Lacrosse Association; he led the country's team that competed at the 2018 FIL World Field Lacrosse Championships. He previously coached at the international level in 2015, when he served as an assistant coach and recruiting coordinator for the U-19 Team USA Indoor squad, which finished fourth overall at the World Games.

At the youth level, Danehy was the National Director of Training for Boston's 3d Lacrosse in 2015. He went on to serve as the Chief Operating Officer for Philadelphia's Big 4 HHH Lacrosse from 2015 to 2017. For both organizations, he was highly involved in creating coaching curriculum and innovative training programs.

A native of Billerica, Mass., Danehy graduated from Dartmouth in 2006. A four-year starter for the Big Green lacrosse team, he posted 84 points (73g-11a), including four (3g-1a) in the program's first NCAA tournament appearance against Syracuse in 2003. He also was a long snapper for the football program.

Following his collegiate playing career, Danehy was selected 49th overall by the Boston Cannons in the 2006 Major League Lacrosse Draft. He went on to spend five years in the league, playing for the Cannons and Chicago Machine.