Experienced Person
noun
Someone who has experience (経験) is an experienced person.
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.
経験者から、価値あるアドバイスをいただくことができました。
We were able to get valuable advice from an experienced person.
やっぱり経験者はちがうね。
As you'd expect, the experienced person's exceptional, isn't she?
コウイチはトーフグに犯罪経験者を雇うと思いますか？
Do you think Koichi would hire an experienced criminal at Tofugu?