Jamison Koesterer joined the Retriever staff in July of 2016 and made a markedly positive impact on the UMBC men’s lacrosse program.
“I am very excited to welcome Jamison to UMBC community and men’s lacrosse staff,” said head coach Ryan Moran, at the time of the hiring. “I have been able to watch Jamison from afar over the past few years and his engaging spirit, work ethic and passion for coaching have always been at the forefront of his coaching identity. He will have an immediate impact on the development of our defense and face-off game.”
Koesterer served as the defensive coordinator for the 2017 Retriever squad, which earned the second seed in the America East Conference Tournament. His defensive corps finished 19th in the nation in goals against average (9.14 per game) and led the nation with only 21 penalties committed in 14 games. Sophomore defenseman and tri-captain Jason Brewster earned America East Second Team honors.
Koesterer previously was on staff for four seasons on the Ohio State men's lacrosse staff under Head Coach Nick Myers (2013-16). A two-time NCAA champion at Johns Hopkins, he spent two seasons as the volunteer coach of his alma mater (2011–2012) before joining the Ohio State program.
In 2013, his first season with the Ohio State, Koesterer guided Buckeye faceoff specialist Trey Wilkes to Second Team All-ECAC honors after he won a league-best 58 percent of his face-offs, ranking 13th nationally. The Buckeyes (11-3) won the ECAC Tournament and advanced to the NCAA quarterfinals. In addition, the OSU defense allowed only 8.83 goals per game, which ranked 13th in the nation.
The following season the Buckeyes shared the ECAC regular-season title and freshman faceoff specialist Jake Withers was second in the conference in faceoff winning percentage and groundballs per game, earning ECAC All-Rookie Team honors. Koesterer’s defensive unit improved to 11th in the nation, permitting only 8.57 goals per game.
In 2015, when the Buckeyes (12-7) reached the NCAA quarterfinals, Christopher May was an Honorable Mention All-Big Ten pick and ranked in the Top 11 in the NCAA in faceoff winning percentage and groundballs per game. Under Head Coach Nick Myers tutelage, Koesterer helped a defense that led the nation by committing only 31 fouls in 19 games and finished 17th overall with a 9.16 goals against average. Defender Robbie Haus earned USILA Third Team All American honors.
In his final year in Columbus, Withers was tabbed the Big Ten Specialist of the Year and was a First Team All-B1G selection and a Third Team USILA All American. He was sixth in the NCAA in groundballs per game (7.33, the most for a Buckeye since at least 2001) and was 12th nationally in faceoff winning percentage (.607), leading the conference in both categories. Haus again earned USILA Third Team All-America honors and was tabbed the Big TEN Defensive Player of the Year. The Buckeyes finished 19th in country with a 9.07 goals against average.
Koesterer was on the Blue Jays' staff for the 2010-11 and 2011-12 campaigns and directed the faceoff personnel. The team made the NCAA tournament each of his two years, with an 11-3 overall record and No. 2 tournament seed in 2012. His faceoff staff won 58 percent of its draws in 2012 and ranked fourth nationally (.649) in 2011, with Matt Dolente second in the nation in winning percentage (.667) en route to picking up first team All-America accolades.
As a student-athlete, Koesterer was a part of the Blue Jays' 2005 and 2007 NCAA championship squads. He won 55.3 percent (176-of-318) of his face-offs during his career, with 101 groundballs, along with seven goals and 12 assists. He claimed the 2010 NLL Championship with the Washington Stealth after playing with the Portland Lumberjax in 2009. With the Stealth, Koesterer won 265-of-446 (59.4%) face-offs and collected 101 loose balls.
A native of Cazenovia, N.Y., Koesterer earned his bachelor's degree in political science, with concentrations in business management and marketing in 2007.