In a strongly worded statement published on X on Wednesday, October 21, 2026, Mosiria accused Sakaja of stripping him of his responsibilities, reducing his departmental budget and frustrating his work long before his official dismissal.
The explosive fallout follows a county government reshuffle that saw Mosiria removed from the Public Participation, Citizen Engagement and Customer Service docket.
The changes, communicated by County Secretary Machel Waikenda, saw Zipporah Njeri Mwangi take over the docket in an acting capacity while retaining her City Culture, Arts and Tourism responsibilities.
Mosiria exposes budget cuts
Mosiria opened his statement by thanking Sakaja for officially removing him from office, before revealing that their differences began nearly three years ago.
“Thank you, my boss, for making my sacking official,” Mosiria wrote.
He maintained that Sakaja effectively dismissed him on December 28, 2023, when his responsibilities as an accounting officer were transferred to junior officers.
Mosiria further accused the governor of reducing his health docket’s budget from Ksh1.2 billion to just Ksh100 million.
He linked the reduction to his refusal to facilitate direct procurement arrangements that he said would benefit individuals close to the governor and county contractors.
Nairobi Governor Johnson Sakaja looking emotional durng a past event. Photo: Nation Source: Facebook.
According to Mosiria, a WhatsApp conference call involving Sakaja and his chief of staff, Osman Khalifa, formed part of the confrontation over procurement decisions.
These are serious accusations concerning the management of Nairobi’s public resources, although the procurement accusations and the reasons behind the budget changes have not been independently verified.
Inside City Hall fallout
Mosiria further revealed that his subsequent transfer to the Environment docket did little to resolve the conflict.
He accused Sakaja of sidelining him by allowing his director to report directly to the governor, effectively leaving him without meaningful responsibilities.
Rather than remain idle, Mosiria said he took to Nairobi’s streets to coordinate enforcement and environmental operations.
He maintained that the assignments ordinarily belonged to junior officers but that he undertook them to continue serving residents.
The former chief officer also described sustained frustrations, including criticism in official WhatsApp groups, public attacks and a contempt of court case that nearly resulted in a six-month jail term.
He said his later transfer to customer service came after he questioned how he was being treated.
Mosiria issues fresh warning
The bitter confrontation escalated further when Mosiria accused Sakaja of preparing another court case intended to have him imprisoned.
He did not provide independent evidence establishing that such proceedings were being prepared.
Mosiria also revealed that his last substantive meeting with Sakaja took place at the governor’s private office in Riverside on December 28, 2023.
He said subsequent attempts to raise his grievances went unanswered.
The former chief officer maintained that his relationship with the governor had deteriorated despite his efforts to continue working within the county administration.
His accusations put fresh attention on accountability, procurement procedures and the relationship between senior county officials.
Sakaja faces growing scrutiny
Mosiria’s accusations add to existing questions surrounding the governor’s administration, including earlier scrutiny of a multibillion-shilling garbage collection tender.
The governor has also faced political resistance over the Nairobi County cooperation agreement with the national government, which Senator Edwin Sifuna questioned over public participation and the protection of devolved functions.
Separately, the governor’s standoff with the Senate over accountability has previously placed his administration under scrutiny.
Concerns about county service delivery have also surfaced, including questions about food quality under the Dishi Na County school feeding programme.
These earlier controversies do not establish wrongdoing in Mosiria’s dispute, but they provide context for the political and administrative pressures facing Sakaja.
2027 battle takes shape
Mosiria’s dismissal comes days after he publicly declared his intention to challenge Sakaja for the Nairobi governorship in the 2027 General Election.
Nairobi County employee Geoffrey Mosiria. Photo/@GeoffreyMosiriaOfficial/Facebook
On October 11, Mosiria expressed interest in the seat during a visit involving Jubilee leaders at Bishop Margaret Wanjiru’s Jesus Is Alive Ministries Church.
His entry adds another name to Nairobi’s growing field of gubernatorial hopefuls, which includes Embakasi East MP Babu Owino and other political figures.
The political contest also comes amid wider scrutiny of Sakaja’s leadership, with the county’s finances, procurement decisions and service delivery increasingly becoming subjects of public debate.
For Nairobi residents following the latest political developments and county governance stories, Mosiria’s accusations raise questions about what happened behind closed doors at City Hall.
Mosiria insists he is ready to serve Nairobi residents as governor, maintaining that his ambition is to improve county systems rather than settle personal differences.
“My desire has never been to fight anyone; it has always been to fix the systems and serve the people of Nairobi,” he wrote.
As of publication, Sakaja had not issued a publicly verified response specifically addressing Mosiria’s latest procurement accusations.
The immediate question is whether the governor will respond to the former chief officer’s account and whether the documents Mosiria references will establish what happened to his responsibilities and departmental budget.
