A USA Lacrosse certified head coach, MacArthur brings with him nearly 30 years of head coaching and playing experience across Canada and in World competition.

MacArthur had an accomplished career as a player, both in college and professional. He was a four-year member of the St. Andrews Presbyterian College men's lacrosse program from 1995 to 1998. MacArthur earned consecutive All-Deep South Conference First Team selections and was named the conference's Player of the Year in 1997. He also received USILA All-America honors in 1997 and 1998, and Academic All-America honors in 1998.

MacArthur has been the driving force behind the success of the Israeli Indoor National Team during his eight years serving as the program's General Manager and Head Coach since 2013. Israel won a gold medal at the European Box Championships in 2017 and earned a pair of top-five results at the World Indoor Championships. In the significant quadrennial championship events, he boasts a 14-7 record as Israel's head coach. MacArthur received the 2016 Israel Lacrosse Man of the Year Award to grow the sport of lacrosse in the nation. He will serve as the head coach of Israel's Sixes Team at the 2022 World Games in Alabama, Birmingham, and was the men's field General Manager in 2018.

Most recently, MacArthur was the General Manager and Head Coach for the Brooklin Lacrosse Club in Major Series Lacrosse, one of the top lacrosse leagues in the world. In 2018, his Brooklin Merchants staff was named the Senior Coaching Staff of the Year.

MacArthur served two stints at the helm of the Clarington Green Gaels of the Ontario Junior B League from 2001 to 2002 and 2011 to 2017. In 2002, he coached the Green Gaels to their third Founder's Cup National Championship in five years. His second coaching stint saw the Gaels finish as Ontario Jr. B League finalists in 2013, 2016, and 2017 and Canadian finalists in 2016. He posted a career record of 150-52-1 as head coach of the Green Gaels, and the program has produced countless NCAA All-Americans and award winners at Division I and II levels.

MacArthur was a first-round draft pick, fifth overall, by the Rochester Knighthawks in the 1999 National Lacrosse League Draft. MacArthur's teams were involved in three NLL championship games, ultimately winning the Champions Cup in 2004 with the Calgary Roughnecks.