Concepcion held the national record in the 200-meter breaststroke from 1988 to 2004. He participated at the 1985 Southeast Asian Games and 1991 edition where he garnered medals. He participated at the 100-meter and 200-meter breaststroke events at the 1988 Summer Olympics and at the 100-meter and 200-meter breaststroke and the 4x100 medley relay events at the 1992 edition of the Games.