Nontraditional students are a growing population in higher education, yet our understanding of the unique factors that predict their success have not increased. Economic challenges, changing work demands, and the desire for personal and professional advancement fuel the nontraditional student's return to school (Kelly & Strawn, 2011). Their isolation and lack of social networks lead to poor academic outcomes as defined by retention, graduation and degree attainment. The classroom offers a beacon of hope for the engagement of nontraditional students, an opportunity to strengthen student identity and draw connections across the multiple worlds where these students reside. This phenomenological inquiry examined the lived experiences of highly nontraditional students enrolled in credit-bearing, undergraduate higher education courses, that used pedagogy related to service and learning and the effects of this pedagogical intervention with attention to civic and student identity, reflecting the extent to which students perceive these identities as marginalized. The central question explored was: To what extent did experiences of learning and service contribute to the civic and student identities of highly nontraditional students? Using Saddington's (1998) dimensions of experience in adult learners' lives, the learner's life experience is utilized for integration, not only as a source of knowledge but also as the content of the curriculum. This research added concepts from Weil and McGill's (1989) Four Villages of Experiential Learning and from Identity Development theory (Tajfel & Turner, 1986). Adult learners' Outgroup and Ingroup identities produce experiences related to personal perceptions, societal power, and validity in roles. Adult learners have vast cultural and contextual experience, as well as pre-constructed meaning schemes (Knowles, 1998, 1990) and service connects to community role identities, and can trigger the exploration and redefinition of identities (Mezirow, 1997; Hogg, 2004; Tajfel & Turner, 1986). Adult learner identity is drawn from multiple sources, past and present, and shaped by beliefs that are contradictory in nature (Kasworm, 2005). Findings include the inherent challenges for this student population related to their Outgroup status, the advantages of pedagogy that uses service and learning, the importance of opportunities for intergroup exchange, and the need for specific faculty roles. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]