[2] Osumba has worked in senior management roles at the Cooperative Bank of Kenya, Impax Business Solutions and Health Data Systems.
[2] Prior to his resignation to join politics, he was the senior sales manager for public sector at Safaricom.
[3] Osumba has a hosted Hatua, a TV show on human rights.
He serves as a member of the Starehe Boys Centre management committee and patron of the Gem Youth Network.
[2] Osumba was named as Peter Kenneth's running mate in the Eagle Alliance after Raphael Tuju stepped down in Mr Kenneth's favour and gave him a free hand to choose a running mate.