About CSSi

CSSi was founded in 2005 as Clinical Site Services to serve individual sites with their patient recruitment needs, later expanding into a major global centralized patient recruitment company. A leader in the industry, CSSi delivers strategic patient recruitment and enrollment solutions to study sponsors, CROs, SMOs, and research sites drawing from it's vast experience of:

  • Over 13 years of developing and implementing clinical trial patient recruitment, enrollment and retention programs
  • Leadership averaging over 20 years in dedicated patient recruitment experience
  • Strategic planning and execution of recruitment campaigns in more than 20 therapeutic areas
  • Assisting more than 3,000 geographically-dispersed research sites worldwide
  • Planning and purchasing over $125 million in enrollment budgets
  • Partnering with many of the top pharmaceutical companies, CROs, SMOs, and research sites

CSSi's in-house patient recruitment team brings to you years of patient enrollment knowledge across all disciplines: creative development, traditional and digital media advertising, patient retention support programs, project management and reporting, national and local outreach, and information technology solutions.

CSSi Mission Statement

Mission Statement

CSSi's mission is to exceed our customers' expectations by providing innovative solutions and outstanding services.

CSSi Vision Statement


CSSi is an advocate of patients receiving the highest quality of medical care while enrolled in a clinical trial. Our goal is to help our clients conduct quality and efficient clinical trials while reducing enrollment timelines and cost by delivering strategic solutions that utilize our expertise in developing site-specific recruitment plans.