About us. Cave springs ADC is a small business in Saint Charles, MO. We are professional, agile and our goal is to celebrate our differences and empower adults living with a developmental disability to live a quality life of their choosing in their community. . Our work environment includes. On-the-job training. Lively atmosphere. In this role, Direct Support Professionals will. (Keep in mind, no two days are exactly the same). Maintain professio...