Career
Youth
Rather than opting to play collegiate soccer, Mayen joined the Chivas United States of America U-18 team Professional
Mayen was signed to a full professional contract by Chivas United States of America on March 27, 2008 after training with the club throughout preseason. He did not make an appearance with the first team in his rookie season, but made 12 appearances in the Master of Library Science Reserve Division, playing primarily as a defender and defensive midfielder.
He made his professional debut on 29 March 2009, in Chivas"s game against Football Club Dallas.
On August 6, 2010, Chivas United States of America sent Mayen, along with teammate Chukwudi Chijindu, on loan to USSF Division 2 Professional League side Miami Football Club. Mayen returned to Florida in July 2011 when he was loaned to NASL club Fort Lauderdale Strikers. Mayen was traded with Justin Braun to Master of Library Science expansion side Montreal Impact for James Riley and allocation money on November 23, 2011.
However, Mayen was waived by Montreal on March 1, 2012 prior to the start of the 2012 season. International
= United States Mayen has made one appearance for the United States U-20 men"s national soccer team, in the Campos Verdes International Tournament in Portugal in 2008.
Mayen was also named to the 2009 Under 20 World Cup in Egypt where he started and played 90 minutes against Germany.
= El Salvador On July 5, 2011, Mayen was given permission by the Fédération internationale de football association to be part of the El Salvador team "After a thorough review of the documentation submitted by the Salvadoran Football Federation, the judge concluded that the player Gerson Mayen Villavicencio meets the objective conditions stipulated in Article 18, paragraph 1 of the Regulations Applicable Statutory of the Fédération internationale de football association: in particular, the player Gerson Mayen has never played an international "A" match in an official competition representing the United States. Soccer Federation," reads the resolution of Fédération internationale de football association. Mayen made his international début at the 2013 Copa Centroamericana, coming on as substitute at the minute in El Salvador 1-1 draw with Honduras.