A Cook
Cook, Chef
noun
You've seen 料理 and probably know it means "cooking." So, what is a person who does cooking? That is a cook or chef.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
彼は世界的に有名な料理人です。
He is a world-renowned chef.
僕の彼女は料理人としてレストランで働いています。
My girlfriend works as a cook in a restaurant.
料理人は料理のプレゼンテーションにも気を配らなくてはなりません。
Chefs also need to pay attention to the presentation of their dishes.