Ecology and Environment is one of the fastest growing, small-sized companies in the United States. The company works with clients to promote and design global sustainable economic and human development projects that create minimal negative environmental impact. It has an international work force of more than 950 staff members. Ecology and Environment has expertise in remediation, construction monitoring, environmental oversight and planning, and air and noise monitoring and mitigation. The company also provides design engineering, compliance support, hazardous waste investigation, and emergency management and training services. In addition, it offers geographical information system services. Ecology and Environment serves the energy, health science, government, mining and information technology sectors. The company maintains locations in North America, South America, Africa, Asia, Europe and the Middle East. Its subsidiary, Walsh Environmental, serves private businesses and federal, state and local government agencies in several U.S. states, including Colorado, California, Utah, Wyoming and New Mexico.