Mcdermott, Mark T. 910 17th Street, N.w, Suite 800 Washington, DC 20006 Phone : (202) 331-1440 Mcdermott, Mark T. Business Category Attorneys Attorneys-Family Law Attorneys-Litigation Law Mark T. Mcdermott 910 17th Street, N.w, Suite 800 Washington, DC 20006 Phone : (202) 331-1440 Business Category Attorneys Attorneys-Family Law Attorneys-Litigation Law Mark T. Mcdermott 910 17th Street, N.w, Suite 800 Washington, DC 20006 Phone : (202) 331-1440 Mark T. Mcdermott Business Category Attorneys Attorneys-Family Law Attorneys-Litigation Law