SGT Jacky Chen, It's best to look at the locations for the units in PA. I live in Carlisle now, and there is a PA NG armory there. There are multiple units throughout the state. There are 4 BCT's of different flavors, so as a junior officer there are jobs to be found in those branches, but there may not be KD jobs available, especially as you get higher up. Unless you are a combat arms officer, it is hard to rise through the ranks unless you branch transfer at some point between the CS and CSS branches. There is a BSB and a CSSB, but I think those are centrally located in PA (one is in Lock Haven). There is a very large training site at Fort Indian Town Gap (again...central PA). There might be smaller detachments out towards Philly, but you need to check with a recruiter or do some online work.

If my memory serves me. CAPT Angove is the officer recruiter for the state at the recruiter Center in FIG.