C6 | Site Solutions | 295 followers on LinkedIn. Building a Predictable and Scalable Enrollment Engine Using Technology and Proven Methodologies | C6 provides innovative, data-driven recruitment services to optimize and accelerate clinical trial enrollment. Our advanced digital marketing campaigns, lead management technology tools, and proven contact center methodologies connect clinical research sites with individuals who are actively seeking investigational treatments. C6 empowers sites to be successful with local advertising budgets and sponsors to be successful with central campaigns.