In this paper, we describe how school counselors can use Marcia's theory of psychosocial identity development to provide differentiated career advisement for adolescent students. Furthermore, we identify how school counselors can use Marcia's theory of psychosocial identity development when collaborating and consulting with teachers and parents to assist them in supporting the career development of students. We explain how school counselors can determine a student's identity status, and we provide highly specific strategies for career advisement for adolescent students in accordance with each of Marcia's identity statuses.