Hon. Lagat holds a Bachelor of Arts Degree, and Diploma in Adult Education both from the University of East Africa, Baraton.
He is a two-time Member of parliament having represented Emgwen and Chesumei constituencies respectively. During his tenure in Parliament he was the Vice Chairman, Labour and Social Welfare Committee, as well as the Chairman, Sports Sub-committee. He was similarly Vice Chairman of the Catering and Health Services Committee and Chairman of the Health Services Sub-committee.
He has served as the Deputy Human Resources Manager in Nandi County, a position he held for five years.
Winner of the 2000 Boston marathon, Hon Lagat is a talented athlete who represented the country in various sports activities across the world.