Coaching Staff

John McCreery - Camp Director 


Head Coach - Vassar College (NY)

John McCreery enters his second season as the head coach of the Brewers men's lacrosse program for the 2019 season. In the 2018 season, John McCreery, was the first assistant and recruiting coordinator for Williams College.

2017 Liberty League Coaching Staff of the Year

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.  

Prior to joining Adams State, McCreery served as the head coach at the University of California Santa Cruz from 2009 to 2010. He led the Banana Slugs to a 10-5 record and a No. 19 MCLA Division II national ranking in 2010. 

From 2006 to 2009, McCreery was the head coach and director of the lacrosse program at the University of Mississippi. While a university student, McCreery redirected a doormat program into a competitive one, leading the Rebels to a combined record of 19-16 during his time in Oxford.

McCreery got his start in coaching at the high school level, severing as the director of lacrosse at Palos Verdes (2005-06) and head woman’s coach at Woodside (2004) in California.

Dieter Treusdell - Assistant Camp Director


Assistant Coach - Vassar College (NY)

Treusdell enters his 2nd season the as the Offensive Coordinator and Director of Recruiting for the Vassar Brewers. Previously Treusdell served as a volunteer assistant for Vassar in 2016. Prior to Vassar, Treusdell was the Offensive Coordinator at Bard College for one season. 

Dieter Treusdell, a native of Gang Mills NY, graduated from Corning West High School. Treusdell played his college lacrosse at SUNY Cortland. He was a part of a division 3 national championship runner up team, along with 3 SUNYAC championship teams. Treusdell went on to play 1 season as a graduate student for North Greenville University (SC) where he attained his MBA.

Tyler O'Keefe - Field Director

Head Coach - MIT (MA)   

Tyler O’Keefe enters his third season as the MIT Walter Alessi Men's Lacrosse Head Coach. Under his tutelage, the Engineers have made two appearances in the NEWMAC Tournament semifinals and have received 33 NEWMAC Academic All-Conference, 15 NEWMAC All-Conference, two NEWMAC Rookie of the Year, one NEWMAC Athlete of the Year, four NEILA Academic All-New England, two USILA Scholar All-America, one IMLCA All-Region, and one NEILA Senior All-Star Game honors.

Prior to his arrival at MIT, O’Keefe was an assistant coach at Williams College for two years. He was the program’s defensive coordinator, head recruiting coordinator and coached the face-off specialists. O’Keefe coached four All-NESCAC performers, one NEILA All-Star, one NEILA Honorable Mention honoree, and two USILA Honorable Mention All-Americans during his time with the Ephs.

O’Keefe’s other collegiate coaching experience includes stints as an assistant at both Rhodes College in 2014-15 and at his alma mater, Springfield College, from 2012-14. As a four-year student-athlete for the Pride, O’Keefe was a team captain as a senior and a two-time Pilgrim League All-Conference honoree. His teams captured four straight Pilgrim League Championships and appeared in the NCAA Division III Tournament in each of his four seasons.

In the classroom at Springfield, O’Keefe earned his Bachelor of Science degree in criminal justice in 2012 and is working towards completing his Masters of Science in movement and sports studies, with a concentration in athletic administration. He was also a member of the Springfield College Criminal Justice Club and worked as a supervisor in the Office of Special Programs at Springfield.


Other Coaches on PARAMOUNT Staff:


Shane Carroll - Assistant Coach - Vassar College

Andrew Nicol - Assistant Coach - Vassar College

Matt Colombini - Head Coach - Emerson College

Nick Taylor - Head Coach - Haverford College

Lane Jaffe - Head Coach - Palos Verdes High School

Nick Hourigan - Assistant Coach - Ithaca College

Casey Dowd - Assistant Coach - Colby College

Nico Brands - Assistant Coach - Bard College

Connor Samuelson - Assistant Coach - Williams College

Drew Deane - Assistant Coach - Bates College