McDonnell joined the club during the 2021-22 season. He has coached previously with the Football Association of Ireland in their U15 Emerging Talent Program. More recently, he spent four years as a Coaching Director at Seacoast United Maine, where he also coached as an assistant for their NPSL team. While in Maine, he served as an Assistant Coach at The University of Maine.
McDonnell has a Master’s in Kinesiology and Exercise Science from The University of Maine in 2021. He holds a UEFA A Coaching License from The Football Association of Ireland and an Academy Director License from USSF. He is representing Minnesota United on the prestigious Elite Formation Coaching License hosted by MLS and the French Football Federation during 2023 and 2024.