Eclipse Adoptium is a top-level open source project under the Eclipse Foundation where Temurin and AQAvit are developed with assistance by ‘new to open source’ contributors under industry mentorship. In this session, we share our experience mentoring new contributors through programs such as Outreachy, Google Summer of Code, and CANOSP. We will survey these programs and share both challenges and success stories. There are some vivid examples demonstrating the advantages for both participants and the open source projects. All of these open source programs have similarities but also their own unique flavor, with variations in goals and term lengths. Outreachy provides paid internships to people subject to systemic bias and impacted by underrepresentation in the technical industry where they are living. Google Summer of Code focuses on bringing new contributors into open source software development. Canada Open-Source Projects (CANOSP) is an academic program that connects top students from Canadian universities to work on open-source projects. In all cases, the value of collaborating with new contributors who bring a diversity of experience and world view is the essence of open source. This talk gives practical tips on working with open source programs but also serves to enlighten others on the mutually beneficial reasons they should engage.