John Snow Inc.
John Snow, Inc., "and its nonprofit affiliate JSI Research & Training Institute, Inc., are public health research and consulting firms dedicated to improving the health of individuals and communities throughout the world." "For more than 25 years, Boston-based JSI and its other affiliates, including World Education, Inc., JohnSnowBrasil and Instituto Promundo, have provided high-quality technical and managerial assistance to public health programs worldwide. JSI has implemented projects in 102 countries, and currently operates from seven U.S. and 44 international offices, with more than 375 U.S.-based staff, and 700 host country national field-based staff." 
- Web: http://www.jsi.com