Mark B. Fenyk opened his office in Marion, Virginia, in 1991 and he began his practice primarily within the Twenty-Eight District.  Throughout the years, however, he has been called upon by different clients to represent them in various courts throughout Virginia.  He has represented clients in many different Districts of Virginia, before various State Agencies, as well as presenting cases before the Virginia Appeals Court and the Virginia Supreme Court.

Mark B. Fenyk has also handled cases in Federal District Court, Federal Bankruptcy Court and before the 4th Circuit Court of Appeals.  His cases in Federal Court have varied from Criminal Defense, Employment Litigation, Bankruptcy and Legislative Matters that have involved Municipal Law.