TRG's consulting clients include:

• Administrative Conference of the United States (ACUS)
• Agency for International Development (USAID)
• Board of Governors of the Federal Reserve System (BGFRS)
• Corporation for National & Community Service (CNCS) 
• Department of Agriculture (USDA)
• Animal and Plant Health Inspection Service (APHIS)
• Food and Nutrition Service (FNS)
• Forest Service (FS)
• National Organic Program (NOP)
• Department of Health and Human Services (HHS)
• Office of the General Counsel (OGC)
• Office of Head Start (OHS)
• Office of Medicare Hearings and Appeals (OMHA)
• Office of Public Health and Science (OPHS)
• Substance Abuse and Mental Health Services Administration (SAMHSA)
• Department of Homeland Security (DHS)
• Transportation Security Administration (TSA)
• U.S. Coast Guard (USCG)
• Department of Interior (DOI)
• National Park Service (NPS)
• Department of Justice (DOJ)
• Drug Enforcement Administration (DEA)
• Department of Transportation (DOT)
• Federal Aviation Administration (FAA)
• Federal Highway Administration (FHWA)
• Federal Motor Carrier Safety Administration (FMCSA)
• Office of Civil Rights (DOCR)
• Office of the Secretary (OST)
• Pipeline and Hazardous Materials Safety Administration (PHMSA)
• Research and Innovative Technology Administration (RITA)
• Department of Veterans Affairs (VA)
• Environmental Protection Agency (EPA)
• General Services Administration (GSA)