Boehly will also act as interim sporting director.
Todd Boehly has been named as Chelsea's new chairperson.
The American led a consortium to take over the club earlier this year.
Boehly will also act as interim sporting director, following the departure of Marina Granovskaia.
He says the club is committed to 'winning both on and off the pitch' as he moves into the new role.

Monday Evening Sports Update
Kildare U16s Power to Leinster A Football Title
Kildare Minors Crowned Leinster B Camogie Champions
All Ireland SFC Draw
Mawdsley Powers Ireland to World Championships Qualification
Mainoo Fires Man United to Win Over Liverpool
Leinster Set for Champions Cup Clash with Bordeaux-Begles
Scottish Title Race Tightens as Celtic Move Level