Go back to directory. Add to Address Book. Mary Helen Cobb VP Membership and Partnerships International Economic Development Council (IEDC) Contact: Mary Helen Cobb Address Suite 900 734 – 15 Street NW Washington DC 20005 USAwork Phone: 202-942-9460work Email: mcobb@iedconline.orgINTERNET Website: www.iedconline.org Categories: 2023 Updated 11 months ago.