[2] Vega began his professional career in with local Grasshopper Club Zürich in 1989, being a defensive mainstay from his second season onwards.
[6] Released by Tottenham in June 2001, after also having refused the Scottish club's offer of an additional year,[7] Vega moved back to England with Watford, penning a three-year deal with the Championship outfit.
His career brought him a total of 23 caps, and he also captained the side on occasion, scoring in the 1–1 friendly match with England – who were preparing for the 1998 World Cup – in Bern.
[citation needed] In 2006 Vega also founded the Matterhorn Capital Rosalp, a Swiss real estate company focusing on the development of luxury hotels worldwide, opening the first facilities in Verbier, Switzerland.
In February 2009, Vega unsuccessfully bid to purchase Premier League team and FA Cup holders Portsmouth from its owner Alexandre Gaydamak; however, he was consistently not able to demonstrate an ability to secure financing for his proposal.