Nouns ending in -ier are usually masculine.
Is cuisinier masculine or feminine?
lecuisinier
The feminine form is cuisinière
The rule behind it
95.4% of -ier nouns are masculine
In context
Je ne peux même pas cuisinier une omelette.
I can't even cook an omelette.
Le cuisinier plaça la nourriture dans le passe-plat.
The cook put the food in the dumb waiter.
Le cuisinier plaça la nourriture dans la desserte.
The cook put the food in the dumb waiter.