A saucier (French pronunciation: ?[sosje]) or Sauté Chef or Sauce cook is a position in the classical brigade style kitchen. It can be translated into English as sauce cook. In addition to preparing sauces, the saucier prepares stews, hot hors d'oeuvres, and sautés food to order. Although it is the highest position of the station cooks, the saucier is still considered subordinate to the chef and the sous-chef.
Chef says he a saucier as part of his conversation with Captain Willard in the prelude to the infamous "FU*KING TIGER!" scene...
WILLARD
Chef?
CHEF
Yes, sir.
WILLARD
How come they call you that?
CHEF
Call me what, sir?
WILLARD
Chef. 'Cause you like mangoes and stuff?
CHEF
No, sir. I'm a real chef. I'm a saucier.
WILLARD
Saucier?
CHEF
Yes, sir. See, I come from New Orleans. I was raised to be a saucier. A great saucier.
WILLARD
What's a saucier?
CHEF
We specialize in sauces. Gotta be a mango tree here somewhere...Then, I was supposed to go to Paris, to the Escoffier School. But then I got orders for my physical.