This literature review examines the influence of experiential learning through student organization involvement on students' professional development and career expectations. Prior to students' transition into the workforce, their socialization into the engineering profession can be shaped by involvement in experiential learning, including student organizations. Previous research has established a breadth of benefits of involvement in student organizations, yet the mechanisms of its influence are less clear, as are the types and extent of involvement that lead to such benefits. Thus, the objective of this review is to further investigate how involvement has been measured and conceptualized in research studies, with a focus on the differential effects of involvement amongst different student populations. This paper investigates the following research questions: (1) How have forms of involvement been measured and conceptualized in studying the impact of undergraduate students' out-of-class experiences on their professional development; (2) what mechanisms have been proposed to explain the impact of experiential learning in student organizations on students' professional development; and, (3) how do participation rates and effects of experiential learning vary across different undergraduate engineering student populations (e.g., gender, race/ethnicity, discipline, socioeconomic status)? Employing a narrative literature review approach, this paper synthesizes current research in engineering education and higher education on experiential learning for undergraduate students, and proposes areas for future research. This review illustrates the challenges in measuring aspects of student involvement, suggesting salient characteristics of involvement that future research might investigate, and identifies types of mechanisms that have been attributed to the influence of involvement, including developing skills, networking with peers, fostering sense of belonging and identity, and encouraging career-related reflection. This review provides insight into the nuance of the breadth of students' experiences in student organizations to inform future work examining the contextual influence of experiential learning on engineering students' professional development. Research Questions The following research questions guided our review: RQ1: How have forms of involvement been measured and conceptualized in studying the impact of undergraduate students' out-of-class experiences on their professional development? RQ2: What mechanisms have been proposed to explain the impact of experiential learning in student organizations on students' professional development? RQ3: How do participation rates and effects of experiential learning vary across different undergraduate engineering student populations (e.g., gender, race/ethnicity, discipline, socioeconomic status)? Methods This literature review employs a narrative literature review approach to synthesize research in engineering education and higher education on experiential learning for unde...