Retaining millennial employees past their average tenure of 1.9 years can be challenging. However, engaging millennial workers and investing in their professional development can help plug the "leaky bucket". The document proposes engaging millennials by matching them with HR coaches, helping them set career goals, connecting them to mentors, integrating them into communities of recent grads, and offering self-paced professional development. This deeply engaging experience creates a revolving door and allows organizations to maximize their next generation of leaders.