U. S. Department of Homeland Security Public Org Chart

 - Click here for it.

For the agencies within the department: 

- Cybersecurity and Infrastructure Security Agency
- U.S. Customs & Border Protection
- U.S. Citizenship & Immigration Services
- U.S. Coast Guard
- U.S. Immigration & Customs Enforcement
- Federal Emergency Management Agency
- U.S. Secret Service
- Transportation Security Administration 

For background on the Department click here.