This report describes a 48-month project which developed, field tested, and evaluated the utility of the Vocational Assessment Protocol (VAP) for use with persons with traumatic brain injury resulting in a severe and persistent disability. The VAP is intended to assist in the community-based vocational rehabilitation of these individuals. The VAP incorporates recognized practices and principles concerning: case management of persons having long-term medical, physical, and psychological needs; sustaining persons in various types of protected, sheltered, and competitive employment situations; and maintaining least restrictive and most appropriate independent living arrangements. After an introductory section, Part 2 of the report discusses the nature, intent, and philosophy of the research and details development of the instrumental process, procedures, and profiles. Barriers to employment are identified and the importance of addressing these issues is stressed. The developmental research underlying the VAP's organization is described. Stages of the instrument's development are outlined and the results of conferences and roles of specific project components are summarized. Part 3 reviews how the instrumentation and procedures were developed and provides detailed discussion of how the VAP is used. Part 4 describes the samples and procedures used in the pilot study validation. Results from the pilot and validation studies are then detailed. (Contains 69 references.) (DB)