A career is a discontinuous a series of work roles using different personal attributes, skills, knowledge, interests, and wants. Individuals must examine their portfolio, select and rearrange it, and then sell themselves to the manager where they work or prospective clients/employers in the marketplace. Individuals should view career capabilities as a mosaic of great diversity and, as inclination, personal circumstances, and market demand indicate, rearrange employability offerings in packages of differing portfolio content. Career security comes from being continually alert to enhancing employability, skilled at career transition, and prepared to oscillate between worklife as a salaried employee and a fee-charging free agent. A free agent defines worklife fulfillment in terms of freedom to exercise personal integrity and undertake assignments compatible with personal values. Employees applying principles of portfolio career management enhance the security of their employability by regularly evaluating, then selecting from 10 career action step options. They seek out opportunities where they work to use their preferred skills, acquire desired new learning, and prepare a Career Action Step Proposal to those who can approve and facilitate the transition to it. The portfolio careerist--free agent or employee--must acquire and apply self-marketing skills; detective and networking skills to identify job moves; interpersonal skills in conflict resolution; and self-discipline to review worklife objectives and integrate them with lifestyle needs. (YLB)