Goal achievement and reaching for desired are the most important things for organizations today. Thebiggest challenge for managers today is competition and dynamism of environment and unknowns of the outside and inside of the organization each affecting the implementation of plans especially strategic ones. Strategy implementation affects service companies which have different nature than other kinds of organizations; the importance of this issue gets more highlighted by Zaribaf, Omid, and Hamid (2010). Diversification and broadness of service sector including individual and social services, professional and commercial and public increases the role and importance of strategy implementation in service companies. This research study intended to investigate the factors influencing strategy implementation in selected public sector departments in Kirinyaga County and by identifying them to achieve an intended pattern that can increase the success of implementation and achieving strategic goals which have been formulated already in strategic planning.