continuator
/kɒntɪˈneɪtər, -niˈeɪtər/Definitions
1. noun
One who continues or pursues something, especially a task or a project.
“The company will appoint a continuator to complete the project after the lead developer leaves.”
2. noun
A person or thing that continues or carries on a tradition, activity, or institution.
“The church has had a continutor for over 200 years to preserve its historical records.”