Quest Diagnostics (DGX) announced a series of senior leadership appointments. John Haydon, Senior Vice President, Operations, has decided for family reasons to take a new position that requires less travel, and will transition to a new role as Vice President, Joint Ventures and Strategic Programs, the company said. James Davis, previously Senior Vice President, Diagnostic Solutions, will become Senior Vice President, Operations, succeeding Haydon. In addition, Lidia Fonseca will join Quest as Senior Vice President and Chief Information Officer, effective April 2. Fonseca previously was the Chief Information Officer at LabCorp (LH).