The information below was taken from here.International Social Service (ISS) is a nonsectarian, nonprofit international social work agency. ISS provides services to children, families and adults who encounter sociolegal problems around the world. It is composed of an international network of over 150 national branches, affiliated bureaus and correspondents, with its General Secretariat in Geneva. Each of the ISS units operates as an individual, autonomous entity within a federated structure. This network expedites communication among social service agencies in different countries in order to resolve sociolegal problems of individuals and families. The reach of the ISS federation is worldwide. In 2001 International Social Service—United States of America Branch (ISS—USA) provided intercountry casework services on five continents. In all, the federation served more than 20,000 households last year.
For more info take a look at http://iss-usa.org/gotopage.asp?PageId=1