How do I address a committee? [closed]

Address them in context to their members. If it is an all-male committee, you can in good etiquette use the address

Sirs,

if the committee is women, you may feel you can use the intelligent & obscure

Mesdames,

(this primarily has the usage "Mesdames Gordon, Thames, Foxworth, and Stein,")

In a mixed context, there is nothing wrong, or even 'dated' about

Ladies and Gentleman of the committee,

if the committee is small enough, you may consider the very-formal

To Mr. Thompson, Ms. Brown, and Mr. Woodrow, Esq., members of the ABCD Organizing Committee,

but, if you can reference them by their function or duty, consider doing so:

Judges Thompson, Brown, and Woodrow,

Committee Members Thompson, Brown, and Woodrow,