Calhoun International is a member, sponsor, or is affiliated with the following organizations:
- Association of the United States Army
- Association of Former Intelligence Officers
- 82nd Airborne Division Association
- Tampa Bay Warrant Officer Association
- Greater Tampa Chamber of Commerce
- National Contract Management Agency
- National Defense Industrial Association
- The Florida Springs Institute
- The Florida Aquarium
- Tampa Bay Watch
- The David A. Straz Jr. Center for the Performing Arts