Where is cssi located? Headquartered in Boca Raton, Florida, CSSI has a strong North American presence and also operates offices internationally, including a wholly owned Technology Center in Hyderabad, India. Interested in Modernizing your System?What does ccssi do? CCSI provides a broad array of management services and technical assistance specifically tailored to meet the needs of local behavioral health, social and human service departments, state agencies, and community-based organizations in Monroe County, across New York State, and beyond. Core services include:Where is csi document services located in oklahoma city? CSI Document Services 2627 E I-44 Service Road Oklahoma City, OK 73111 Phone: (405) 478-9000