His fallout with Sakaja had been building for nearly three years. Mosiria accused the governor of sidelining him, cutting his budget, and stripping him of key powers
Former Nairobi County Chief Officer Geoffrey Mosiria has been admitted to hospital after suddenly allegedly falling ill during an evening meeting in Nairobi on Thursday.
Colleagues present said he collapsed unexpectedly, prompting them to rush him for emergency medical attention.
Duke Mainga said he, together with activist Morara Kebaso and a colleague identified as Mirina, accompanied Mosiria to hospital.
Mosiria later confirmed that he was receiving treatment and asked Kenyans and his supporters to keep him in their prayers. He expressed confidence that he would recover soon.
The exact cause of his illness has not been officially disclosed, and reports claiming food poisoning or a severe infection remain unconfirmed.
The hospitalisation came only eight days after Nairobi Governor Johnson Sakaja removed Mosiria from his position as Chief Officer for Public Participation, Citizen Engagement and Customer Service.
The changes were communicated in a circular dated October 21 and signed by County Secretary and Head of Public Service Dr Machel Waikenda. Zipporah Njeri Mwangi was appointed to take over the docket in an acting capacity.
Mosiria’s removal followed his public declaration that he intended to challenge Sakaja for the Nairobi governorship in the 2027 General Election.
He had positioned himself as a “Mr Fix-it” candidate, promising to address problems such as poor health services, flooding, and weak service delivery in the capital.
Politically, Mosiria is a former Nairobi County chief officer who first served in the Health Facilities docket, was later moved to Environment in August 2024, and then reassigned to Citizen Engagement and Customer Service in November 2025.
He became widely known for public enforcement operations against activities he considered harmful to Nairobi’s cleanliness and order.
His fallout with Sakaja had been building for nearly three years. Mosiria accused the governor of sidelining him, cutting his budget, and stripping him of key powers, including his role as an accounting officer.
He also dismissed corruption allegations related to medicines and chemists during his time in the Health Department, saying he served diligently and challenged anyone with evidence to take it through legal channels.
The development has added to growing political tension at City Hall ahead of the 2027 elections. Sakaja is expected to seek a second term, while Mosiria’s declared bid places him on a direct loggerhead with his former boss. For now, attention remains on Mosiria’s health, with netizens wishing him a quick recovery.
