SPRINGFIELD — Daniel C. Didech is a familiar face around the state Capitol after working as Senate President John J. Cullerton’s assistant legal counsel for a year in 2015.Now it’s time for Didech to serve in office himself. Didech, a Buffalo Grove Democrat and attorney at Del Galdo Law Group LLC in Berwyn, will serve as a state representative in the 101st General Assembly.As an attorney, Didech represents local government entities, such as villages, cities and townships. His background is working one-on …