Do Bachelor’s degrees “expire”

I tried to find my own info but had no luck. I am currently in the military but working towards my bachelor's as well. I am set to graduate next year but what if I end up staying military for 15 more years? When I get out, I will want to start my biology related career but I worry that applying to jobs, they will see my bachelor's is 15 years old with 0 experience. I'd love to have a military career and a biology career. Should I wait to finish my degree until I am closer to being able to use it?