Development is a multi dimensional process involving the up ward movement in the entire social system. Therefore, the realization of Millennium development goals calls for project management strategies that will lead to project success and thus millennium development goals becoming a reality. For this to be achieved, effective project implementation strategies have to be put in place so as to assure and ensure project success without which the project can not see the light of day. Therefore, the purpose of this study was to establish the contribution of project integration services on the successful implementation of CDF projects. To meet the purpose, the study sought; To find out the project integration services used in CDF projects for successful implementation; To establish the techniques of project integration services used in CDF projects; and to find out the challenges faced in using project integration services. The study had a target population of 540 respondents consisting of project managers, project committee members, and community members of projects funded by CDF. From the target population, a sample size of 162 was selected using stratified and simple random sampling. Data for the study was collected using questionnaires and analysed descriptively by use of percentages and frequencies. The paper found out that project integration services include project appraisal services, risk analysis services, technical specification services and analysis of spill over. It also found out that the common techniques used are joint appraisal of projects by stakeholders, project proposal by the community, risk analysis by stakeholders and cost estimation through consultations and that the effects of project integration include less costs of evaluation and implementation and quality projects. The study recommends that the CDF should implement training to workers, that corporate governance policies should be provided to workers through seminar and that continuous auditing of projects should be done to identify problems early enough. It further recommends that politicians should not take part in the project appraisals and that competent managers with proficient knowledge in project management should be actively involved in the management of CDF projects and finally, enough finances should be provided so as to implement project integration in the constituency.