Osei was a member of the Ghana national team in the early 1990s whilst playing for Asante Kotoko, he received call ups into the team through the then coach Burkhard Ziese. Most notable was playing in the 1992 African Cup of Nations qualifiers ahead of the 1992 African Cup of Nations. He played alongside players like Emmanuel Armah, Frimpong Manso, Abedi Pele and James Kwesi Appiah within that period.