Federico Gallego started his youth career with Institucion Atletica Sud America, where he also made his senior debut in 2010. He arrived in India to play for NorthEast United FC in the Hero ISL 2018-19 campaign and was one of the most influential players in the team, helping the club reach its first-ever semi-final. The Uruguayan dynamo missed the first half of the 2019-20 campaign due to injury, and managed to make 10 appearances while scoring one goal and assisting one more. Retained ahead of the 2020-21 season, Gallego played another pivotal role as the Highlanders finished 3rd and booked their place in the playoffs twice in three seasons. He will look to replicate the form that made him a fan favourite at the club in the 2021-22 season.