This chapter discusses the diagnostic radiology residency training pathway to board certification. The chapter discusses what a diagnostic radiologist does and then describes the application through interview processes. Testing requirements and timelines for board certification and maintenance of certification are outlined. Many references are made to the Accreditation Council for Graduate Medical Education (ACGME), Electronic Residency Application Service (ERAS), National Resident Matching Program (NRMP), and American Board of Radiology (ABR) websites because these are the main organizations you will be working with and will be a source of further information.