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.
We were able to get valuable advice from an experienced person.
As you'd expect, the experienced person's exceptional, isn't she?
Do you think Koichi would hire an experienced criminal at Tofugu?