One who corrects or makes amends.

Someone who brings about correction or improvement.

सुधार लाने वाला

English Usage: The corrigent was known for transforming underperforming teams into successful ones.

Hindi Usage: सुधार लाने वाले को कम प्रदर्शन करने वाली टीमों को सफल बनाने के लिए जाना जाता था।