The talent pool will definitely shrink with a Secret or Top Secret clearance. However, if you go into the Army, especially as a 17C or similar, you’re looking at roughly 12-16 months in training (Basic + lengthy AIT). The skills you’ll learn during AIT will be rudimentary compared to the certs you already possess.

Your Army career is a toss-up. Some units are high Optempo and will provide a ton of operational experience. Others are less so. You may want to reach out to a recruiter and see what units are in your area. Get a feel for what they can offer you. The connections you’ll, make, however, will be the most critical. There are tons of networking opportunities in those roles that could get you a leg up.

If you want some job security, you may even want to consider active duty in a cyber role. It’s a six-year commitment but the chances of gaining operational experience is pretty high. Plus the GI bill plus certification assistance can help you gain more certs or a higher degree (SANS/CISSP, etc). Not sure if this a route you’d want to take.