coleader
nounUK /ˌkəʊˈliːdə/
US /ˌkoʊˈliːdər/
A coleader is a person who leads a group together with another person.
Maya and Sam are coleaders of the school art club.
OTHER MEANINGS
2. A person who shares the top position in a company or organization with someone else.
The two coleaders made every big decision together.
3. One of two people who guide a team or activity side by side.
As coleaders, they took turns running the weekly meeting.
4. A partner who helps direct a project along with the main leader.
She was named coleader of the science fair project.