Volunteer rates of Millennial postsecondary degree recipients continue to decline in the United States; consequently, the loss of volunteers onboarding with skill sets non-profit organization's need persistently places these organizations at a disadvantage. The purpose of this qualitative, phenomenological study was to explore Millennial postsecondary degree recipients' reasons for not onboarding with volunteer organizations during life after college. The theoretical framework used for this study was Mannheim's theory of generations. The study used Giorgi's descriptive phenomenological design with data collected via semi-structured interviews. There were 11 Millennial participants with bachelor's degrees who had transitioned to life after college, in addition to having previous volunteer experience but had chosen not to volunteer after graduating. The study revealed that the Millennial participants have experienced societal pressures and economic hardship brought on by ambiguities of being independent and their economic realities. Although a willingness of the mind exists, so do barriers such as time, work obligations, family responsibilities, financial positioning, and personal commitments that make them unable. Volunteer organizations, universities, and further researchers would benefit from learning about the reluctance to onboard with volunteer opportunities in life after college. Organizations will need to find a delicate balance of maintaining communication with Millennials, providing services conducive to helping them during the difficult transition to life after college, and encouraging them to utilize skills to assist with organizational missions. Early intervention through volunteer organizations and university programs prior to exiting college may help improve the volunteer sector's relevance and ideally change how Millennials with postsecondary degrees prioritize volunteering. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]