Going undrafted in both the
2011 MLS SuperDraft and
2011 MLS Supplemental Draft, Mackay went into sports management, specifically becoming a player agent for the Stellar Group Agency, where he worked as an agent for footballers across the United States and Europe for about 10 years. In 2020, Mackay joined
Nashville SC as a general manager, where he helped sign several notable players for the club such as
Hany Mukhtar and
Walker Zimmerman. In 2023, he was hired by
D.C. United as both their general manager and Chief Soccer Officer. He departed the club in September 2025.. On February 5th,
St. Louis City SC announcement that the club hiring
Ally Mackay as an assistant Sporting Director. == References ==