The Mentored Career Transition Award for NIMH Intramural Fellows (K22) is a two-phase, mentored career development award program that is intended to facilitate a timely transition of qualified postdoctoral fellows in the NIMH Division of Intramural Programs (DIRP) from intramural postdoctoral research positions to extramural, academic tenure-track or equivalent faculty positions at eligible U.S. institutions. Both the intramural and extramural phases will be mentored, and the award will provide research support during the extramural phase to help awardees launch competitive, independent research programs. This Funding Opportunity Announcement (FOA) is designed specifically for applicants proposing to serve as the lead investigator of an independent clinical trial, a clinical trial feasibility study, or a separate ancillary study to an existing trial, as part of their research and career development. Applicants not planning an independent clinical trial, or proposing to gain research experience in a clinical trial led by another investigator, must apply to companion FOA (PA-18-NNN).