Certus International, Inc. | 1,605 followers on LinkedIn. A fully Integrated CRO and Imaging Core Lab Service Company | Certus International is an integrated Contract Research Organization and Imaging Core Lab Service Company offering a full range of clinical trial management, consulting and imaging services. Certus, founded in 1995, is a company whose goal is to be accessible, reliable and transparent for its clients. We do this, in part, by being flexible, maintaining a flat organizational structure, having a real person answer the phone when you call and constantly improving customer service, no matter how good you think it is.