Esther Koimett joined the Board of Safaricom on 24 May 2005. She previously served on the Board between 11 April, 2001 and 5 September, 2002. She holds Bachelor of Commerce and MBA degrees from the University of Nairobi and is currently the Investment Secretary in the Treasury. Esther has also served as Permanent Secretary in the Ministry of Tourism and Information and Managing Director, Kenya Post Office Savings Bank.