He was named as the ninth head coach of the program after serving one year as an assistant at Williams College following a three-year assistant term at Vassar.

McCreery guided the Brewers to a 3-2 mark in a pandemic-shortened season in 2020. Highlighting the season were three consecutive wins over Mount Saint Mary College, Oneonta State and Maritime College. Individually, Michael Mullen '20 became just the second player in Vassar program history to score 100 career goals, while Matthew Lowery '20 was a two-time preseason All-American selection.

In his return to the Vassar sidelines in 2019, McCreery guided the Brewers to a 4-11 mark, along with a 2-6 record in Liberty League play. Two players were named to All-Liberty League Teams, while Matthew Lowery '20 became just the second player in Vassar men's lacrosse program history to garner All-America honors.

McCreery returns to the Vassar sidelines after helping the Ephs to a 6-4 record in the ultra-competitive New England Small College Athletic Conference (NESCAC) in 2018.

Prior to that, McCreery served as the defensive coordinator and first assistant at Vassar from 2015-2017. In 2017 the Vassar staff was honored as the Liberty League Coaching Staff of the Year when the Brewers made their first ever playoff appearance as the third seed. The 2017 Vassar defense allowed just 8.63 goals per game and their man-down was ranked second in the Liberty League.

Also during that time, VC saw 11 players earn All-Liberty League honors, including its first First Team honoree since the 2010 season. McCreery also mentored the Liberty League Rookie of the Year in James Thomas in 2016, and assisted VC's first lacrosse All-American in Liam Moriarty in 2017.

Before joining the Vassar staff, McCreery served as the head coach of the lacrosse team at Adams State University from 2012 to 2014. In addition to providing overall leadership, management and planning of the program, McCreery was responsible for hiring and developing the coaching staff and monitoring academic performance of the student athletes.

As an assistant coach with the Grizzles from 2010 to 2012, McCreery was involved in the development of lacrosse at Adams State as the team transitioned into NCAA Division II status in 2010. McCreery performed scouting, evaluating and recruitment of student athletes, and was responsible for growing the roster from 35 to 65 players during his time with the program.