You've left out one key piece of information: What do you want to do for a living? Do you want to continue working for the feds in logistics?
Law School, particularly after the first year, ads little to no value other than giving you the ability to get a law license. Sure, law school can teach you to "think like a lawyer," but I'm sure you can learn contract law on your own, especially if you are smart enough to excel in logistics at the Ph.D. level.
There is a difference between needing a law degree and wanting to know things about law.