Guillermo Hauché

New England Revolution

On September 13, 2018, Hauche signed with the New England Revolution of Major League Soccer. Prior to joining the Revolution, Hauche had been without a club since early May, following the end of his loan stint with Deportes Temuco. At the time of his signing, the Revolution were five points out of a playoff position with six matches left in the regular season, and were looking to add attacking pieces to help with their playoff push. Revolution GM Mike Burns praised Hauche as a very technical player who would provide the team with another attacking option heading into the final stretch of the season. Head coach Brad Friedel was equally complimentary of Hauche's skill set, calling him "a goal scorer and a goal creator.”

On September 22, 2018, Hauche made his league debut, deployed as a left back, at home against Chicago Fire FC as a 46th-minute substitute for Brandon Bye. The Revolution would draw the match 2-2. Hauche received high praise from teammates and his coach alike in his debut, with Friedel calling him "a very, very good player in the opponent’s attacking half of the field." and adding that Hauche "knows how to unlock defenses, and we’re just going to try to get him up to match speed as quickly as possible." Teammate Andrew Farrell called Hauche a "great player on and off the field."

He would make his first start for the club the following week, this time as a right winger, at BMO Field against Toronto FC. The Revolution would lose the match 4–1. He would start again in the Revolution's 2–1 away loss to Atlanta United FC.

Hauche concluded the 2018 season with a 47.8 accurate pass percentage in 175 minutes with no goals and no assists in four scoring chances.

New England declined Hauche's contract at the end of their 2018 season.

Later career

In 2021, Hauche signed with General Caballero Sport Club in Paraguay.