A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Business Administration (Corporate Management)of the School of Business KCA UniversityThis study examined the effects of vandalism on service delivery with a look at transformers, cables, meters and manhole covers. It was limited to Nairobi and to three corporations which are Kenya Power, Nairobi Water and Sewerage Company, and Safaricom. The interest was on vandalism of service infrastructure since this is one of the biggest contributors to inefficiencies and market failures for electricity, water supply, communication, and security. The study was designed on a descriptive survey and the data obtained was analyzed by descriptive statistics and content analysis technique. The target population was 60 management staff from the three corporations. Finding from the research suggested that the greatest factor contributing to vandalism is the lack of sense of ownership of the infrastructure. Other factors are the location of the infrastructure lack of clear communication and reporting structures .Poverty levels contributed the least. Vandalism affects the service delivery by the affecting response to the customer needs, accessibility of services by the customer, efficient service restoration capability, infrastructure connectivity and increase in capacity. In order of importance the strategies to mitigate vandalism are strengthening the legal and judicial system of law enforcement for prosecuting the vandals is the most important followed by company policies, educating the citizens to increase their knowledge on the importance of the infrastructures, changing the location of the infrastructure and lastly redesigning the infrastructure. However, redesign of the equipment was found not to be a viable strategy. The greatest challenge to the current efforts aimed at curbing vandalism is insecurity, government policy, and legal and judicial law enforcement. Utility companies suffer from problems associated with and inherent in vandalism. Consequently, the recommendations drawn from this thesis are not confined to Kenya Power, Safaricom, Nairobi City Water and Sewerage Company (NCWSC) but to other related institutions throughout the country.