PK, if you're accustomed to the winters in Illinois (near Chicago?) you'll laugh at our winters here. However, the further west you go here the more snow you do get, and we have had winters where there was lots of snow on the ground for several months. But Md tends to take good care of their roads.
I believe overall the job market is still pretty good in Md, but I'm in Carroll County, and I know it can be different towards Hagerstown. However, that's fairly close to Frederick, Germantown/Rockville as far as commuting goes.
westsideboy will be able to give you much better info than myself though.

Good Luck!