Career
He plays as central midfielder or central back and is 1.86 m height. Before moving abroad he played with Bechem United in Ghana. In 2009, after a short period with Football Club Saturn Moscow Oblast he moved to Finland signing with Football Club Haka.
During 2010 he played with Football Club Haka in the Veikkausliiga where he made 22 league appearances during that season.
In summer 2011 he moved to Serbia and after a month-long trial on August 29 he signed a 3-year contract with FK Hajduk Kula. During the winter break of the 2011-2012 season he lefy Hajduk Kula and joined Club Valencia playing in the Dhivehi League, the highest football league of the Maldives.
In the first half of 2014 he played in Iceland with BÍ/Bolungarvík having played 2 matches in the 2014 Deildabikar. Next he moved to Saudi Arabian first division league side Hetten Football Club. With Hetten Football Club he played in the 2014 King Cup of Champions.
Quincy Osei has been part of the Ghana Olympic team during the 2011 CAF U-23 Championship which was the qualifying tournament for the 2012 London Olympics.