A forward, he was one of the most important players of the Cameroon national team in the nineties, playing at the three World Cups in 1990, 1994 and 1998.

[5] In 2003, he played in the Adecmac amateur soccer league in Mexico City with Club Deportivo Sahara, where he scored 10 goals in the season.

Omam-Biyik's greatest moment came when he scored the downward header that gave Cameroon a historic 1–0 win over defending world champions Argentina in the San Siro in the opening match of the 1990 World Cup.

[2] Following his retirement Omam-Biyik moved to Colima, Mexico, where he was the head coach of the city's Second Division professional soccer team.

On 20 July 2013, Omam-Biyik was signed to coach Gabonese champions Union Sportive de Bitam, replacing his compatriot Thomas Libiih.