Conciliator
/kənˈsɪlieɪtər/
Definition 1 of 1
Pro Tip 1/3Conflict Resolution
Used when someone resolves arguments or disagreements between others. 
During the team meeting, she took on the role of a conciliator to resolve the ongoing conflict.
Pro Tip 2/3Neutral Party
A conciliator is impartial, not belonging to either side of the disagreement. 
The company hired an external conciliator to ensure a fair discussion between management and employees.
Pro Tip 3/3Active Role
Implies taking an active part in the resolution process, not just being a passive observer. 
As a conciliator, her role was to actively engage with both parties to find a mutually acceptable solution.