Ochomo, who joined Bandari from Kakamega Homeboyz, scored the lone goal in the 90th minute after directing a Felly Mulumba’s cross into the left corner to rescue Bandari from an impending draw with National Super League side.
Okumbi was among the guests that graced day two of the Kariobangi Sharks open tournament.
Other participants in the three-day tournament are Sharks, Mathare United and Kibera Allstars.
Bandari are yet to lose a match having beaten hosts Sharks 3-2 in the opening tie on Thursday at the Utali Grounds.
The Dockers will next take on Kibera Allstars in the last match of the day. Meanwhile, KCB will return to the pitch against Kariobangi Sharks.