けいけんしゃ

経験者
experienced person
person who has had a particular experience

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けいけんしゃ【経験者】

a person (who is) experienced 《in…》; 〔仕事の〕 an experienced [old] hand.

●首相経験者 an MP [a person] who once served as prime minister

・離婚経験者 a divorcé [divorcée].

●経験者募集[求む]. 〔求人広告〕 Wanted: People with experience 《in retailing [as ESL teachers]》.

・経験者は語る. Only someone who's been through it can talk about it.

・まさに「経験者は語る」というやつだね. You're a perfect example of “Only someone who's been through it can talk about it.”