[ThirdMate]

What is I&I, as in “Brian Dye, Operations Chief of I&I”?

Good find.

[Travis McGee]

Beats me. Intelligence and Interrogation? That will do unless we know otherwise.

Quisling bastards.

[xone]

What is I&I, as in “Brian Dye, Operations Chief of I&I”?

Inspector and Instructor duty for a Marine Reserve unit. So Brian is likely a SNCO with the active component of a Marine Reserve outfit.