; (B) at the discretion of the Secretaries of the military departments, the development and maintenance of civilian and military career tracks on digital engineering, and related digital competencies (including data science, machine learning, software engineering, software product management, and artificial intelligence product management) for civilian employees of the Department and members of the Armed Forces, including the development and maintenance of training, education, talent management, incentives, and promotion policies in support of members at all levels of such career tracks