slick operator

Translations
ловкий манипулятор
He is a slick operator when it comes to closing deals.
Он ловкий манипулятор, когда дело доходит до заключения сделок.
Definitions
A slick operator is a person who is smooth, persuasive, and often manipulative in their dealings with others, typically using charm and cleverness to achieve their goals.
Words
slick

adjective
ловкий
operator

noun
специалист