Pittsburgh Business Lawyer | Divorce & Family Representation Attorneys. For more than 40 years, the team at Feldstein Grinberg Lang & McKee, P.C. has been assisting businesses and families with legal advice and representation. When you must make important legal decisions for your family or your business, you need the assistance of skilled attorneys. At Feldstein Grinberg Lang & McKee, P.C., our focus is on family and business law, two areas that overlap in everyday life. Our Pittsburgh firm provides you with the guidance and advice you need in your personal or business legal case.