After 10 seasons with them he moved to Once Municipal to become player/coach in 2006 and finished his career with a return to lower league outfit Alba-Ajacutla. Guevara made his debut for El Salvador in a March 1999 UNCAF Nations Cup match against Guatemala and has earned a total of 18 caps, scoring no goals.
Nicknamed el Jefe (the boss), Guevara started his career at local club Tiburones, then had a lengthy spell at Salvadoran Premier League side Alianza with whom he won several league titles. He has represented his country in 7 Fédération internationale de football association World Cup qualification matches as well as at the 1999 UNCAF Nations Cup. His final international game was a September 2004 Fédération internationale de football association World Cup qualification match against Jamaica.
