A person who delivers or transports packages/goods (delivery worker, delivery staff).
宅配の配送員が午前中に荷物を届けてくれた。
The delivery worker from the courier service delivered the package in the morning.
配送員にサインをした後、荷物を受け取りました。
I received the package after signing for it from the delivery person.
冬は配送員の仕事が忙しくなる。
Delivery workers get busy in winter.