A Cabinet Member
Envelope:
The Honorable Charles Timothy Hagel*
The Secretary of Defense
*Only use the full name on official mail, not social mail
Salutation: Dear Mr. (Madam) Secretary
Oral Address: Mr. (Madam) Secretary
Place Card: The Secretary of Defense
Addressing his wife as well? Envelope:
The Honorable Charles Timothy Hagel
The Secretary of Defense
and Mrs. Hagel
For Deputy Secretaries: Same as above, just add "Deputy" before "Secretary."
[Photo: Public Domain]