I recommend reading Patrick Bell and my article from June 2018:

“The Department of Defense (DoD) must abandon its “up-or-out” promotion model for cyber forces. It should let competent officers hold their positions longer. Applying the outdated Defense Officer Personnel Management Act’s (DOPMA) staffing model to the cyber force is foolish, and makes it difficult to keep experienced, technically-proficient cyber officers in the military. DOPMA’s prescribed career paths entail officers’ attendance at a variety of schools, with several rotations through geographical areas and work domains. In the process, domain-specific knowledge that would allow officers to lead and understand the impact of their various choices in a technically complex and ever-changing environment evaporates. In a world of increasing complexity, shortened windows of opportunity to act, and constantly-changing technical environments, the generalist leaders that the DOPMA system yields may doom the military’s cyber force to failure.”

The link to the article:

https://warroom.armywarcollege.edu/articles/death-of-cyber-generalist/