IEC has worked with the following federal and state government agencies:

• Environmental Protection Agency (EPA)
• Intelligence Community
• National Institute of Standards and Technology (NIST)
• National Park Service (NPS)
• National Security Agency (NSA)
• New York City Department of Environment Protection
• State of New York Department of Health
• State of New York Department of Mental Health
• Tennessee Valley Authority
• U.S. Geological Survey (USGS)