This legislation aims to support mid-career workers seeking to re-enter the workforce in science, technology, engineering, and mathematics (STEM) fields by establishing a national grant program. The program is designed to provide funding to small and medium-sized STEM businesses, enabling them to offer paid internships or "returnships" that lead to higher-level job opportunities, rather than just entry-level positions. Key provisions include the establishment of grants specifically for returnship programs targeting unemployed or underemployed mid-career workers.