In the medical field, the implementation of Milestones by the Accreditation Council for Graduate Medical Education (ACGME) has provided a common understanding among clinical and academic supervisors and trainees related to the development of core competencies during graduate medical training. These Milestones help establish developmental trajectories and aspirational goals for the trainee. Unfortunately, training in graduate and postgraduate neuroscience lacks a standardized developmental progression of competencies or outcomes expected of trainees. Without such standardizations, it may be difficult for both the mentor and trainee to identify levels of improvement, which may impact the trainee's future success. Here, we discuss the value of developing a nonexhaustive framework that may be used to evaluate trainees with the expectation that it will provide a template to help with the development of future neuroscientists.