Nairobi City Water and Sewerage Company Managing Director Nahashon Muguna has resigned from his position, marking the end of his tenure at the utility firm.
In a letter dated September 26, 2025, Muguna said he would take his annual leave days as part of his notice period and requested a waiver of the balance, citing company policy.
“This decision has been reached after careful consideration, and I believe it is in the best interest of both myself and the organization at this time. I have resigned to pursue other endeavors and I am grateful for the opportunity to have served the people of this great city of Nairobi,” he stated.
Muguna expressed gratitude to the company’s board and staff for their support during his leadership, noting that he remained confident the organization would continue to grow under new leadership.
He also thanked Governor Johnson Sakaja for his guidance in improving water service provision in Nairobi.
“To the staff of Nairobi City Water and Sewerage Co. Ltd, I could not have worked with a better team,” he said.
Before his official appointment on May 27, 2020, Muguna had been serving in the same role in an acting capacity since August 2017.
His prior experience includes a significant tenure as the Director of Technical Services at Nairobi City Water and Sewerage Company Ltd, a position he held from August 2010.
By that time, he had accumulated over 28 years of experience in water utility management. Over the course of his career, he oversaw numerous major projects, including the Third Nairobi Water Supply initiative, which received joint funding from the World Bank and the African Development Bank.
Muguna was instrumental in establishing the company’s informal settlements department, which was created to enhance access to water and sanitation services in Nairobi’s low-income communities.
He earned his Bachelor of Science degree in Mechanical Engineering with upper second-class honors from the University of Nairobi in 1990. He also holds a Master of Business Administration in Strategic Management, jointly earned from the University of Liverpool in the UK and the University of Nairobi.
He also serves on the Executive Board of the African Water Association (AfWA).
At the same time, the company’s board announced the appointment of Martin Nangole as the acting Managing Director following Muguna’s exit.
The board said the decision was also informed by a High Court ruling that barred any extension of Muguna’s tenure beyond the mandatory retirement age.
In its ruling, the court declared that Muguna’s reappointment could not be extended past December 2025, noting that it would be unlawful.
The judgment further observed that there was no indication Muguna possessed exceptional skills or expertise that would warrant his retention beyond the set retirement limit.
The court also directed the board to begin a competitive process to recruit a substantive Managing Director to ensure a smooth transition.
While it affirmed that the board had properly processed Muguna’s renewal request, it ruled that keeping him beyond retirement would be “illegal, null, and void.”
With Nangole now steering the utility firm in an acting capacity, the company enters a transition period as it prepares to seek new leadership.