- His full name is Dennis Oguta Oliech
- He was born on the 2nd of February 1985
- Oliech started playing football for Dagoretti Santos in his earlier years, then Mathare United.
- He turned professional in 2003 playing for Al-Arabi in Qatar
- In 2004 he was offered a chance to change his citizenship from Kenyan to Qatari. But he refused the offer.
- Oliech was signed on loan by Auxerre who were in need of goals after a bad start to their season.
- In January 2011 Auxerre signed him from Nantes.
- He signed to AC Ajaccio On January 22, 2013
- His first international match was in 2002, between Kenya and Nigeria.
- Oliech’s older brother, Nixon Onywanda, is the coach of the Kenyan side Dagoretti Santos
