noun
amender; corrector; reviser
A person who makes corrections or amendments, often in formal, editorial, or legislative contexts.
法案の修正者は、細かい文言の変更を提案した。
The amender of the bill proposed minor wording changes.
原稿の修正者として、彼は誤字を一つずつ直していった。
As the corrector of the manuscript, he fixed the typos one by one.
校正者 is a proofreader, focusing on checking printed proofs, whereas 修正者 is a broader term for anyone who makes corrections.
Compound of 修正 (amendment, correction) and 者 (person).