projects in the ENGINEER program relating to future and current engineers’ training and education in many contexts, including formal classrooms, informal maker spaces, clubs and co-curricular activities, and workplaces. Such training encompasses cooperative education and internships, community-based experiences, and research labs. It also involves many scales of analysis, from mentor/mentee relationships to large-scale online learning and professional development experiences. Engineers must develop and maintain these learning opportunities with clear pathways to and through the profession. Such pathways include formal and informal education, apprenticeships, credentialing, and licensure, and consider relationships with other professionals, technical workers, and community members. Finally, such opportunities include transitions across and within academia and industry. To understand and improve this system requires expertise in both engineering and the social sciences.