Career
Early career and While still a student at the Upper Hill School, Olunga began his career with the Liberty Sports Academy in the Nairobi County League. He scored 30 goals for the side during the 2012 season, helping them finish the season unbeaten and earn promotion to the Nairobi Provincial League. Initially reported to be attending trials in France, Olunga signed for Premier League side on a one-year loan deal from Liberty on 19 December 2012.
After finishing the 2013 season with two goals for, Olunga was loaned to fellow Premier League side Thika United for another year, before joining before the beginning of the 2015 season.
Djurgården On 17 February 2016, Olunga joined Djurgården on a four-year contract, after joining the team"s pre-season training camp on trial. Olunga made his debut for the Kenya national team in a friendly against Seychelles at the Stade Linité in Victoria on 28 March 2015.
He scored his first goal for the Harambee Stars in a 2017 Africa Cup of Nations qualification match against Zambia, but could not help prevent his side falling to a 2–1 loss at the Nyayo National Stadium. Olunga studied geospatial engineering at the Technical University of Kenya, where he enrolled in 2013 and pursued a Bachelor of Engineering degree.
Foreign this reason, he is regularly known as "The Engineer" by Kenyan football fans.
He has stated that he looks up to Dutch striker Robin van Persie as a role model. Club individual.