STEM Education and Recruitment by Valuing Increased Community Engagement Act of 2020 or the SERVICE Act This bill directs the Department of Defense (DOD) to promote interest in careers in STEM disciplines, including to maximize strategic partnerships between institutions of higher education and private sector organizations to build and strengthen communities involved in such disciplines. The term STEM disciplines means disciplines relating to science, technology, engineering and mathematics, including disciplines that are critical to the national security functions of DOD and that are needed in the DOD workforce.