From TheChels.info - The Chelsea Football Club Wiki
Granovskaia is a long-time associate and adviser of club owner Roman Abramovich, having looked after his assets and interests since the late 1990s. She has been a key influence at the club since 2010, when she began to act as the owner's representative on the board. Her position was formalised in 2013 and in late 2014 her importance grew further when Chief Executive Ron Gourlay left the club, with his executive responsibilities absorbed by Granovskaia and Club Chairman Bruce Buck.
In her role she oversees the football side of Chelsea's business, including high profile contract negotiations and signings and is reported to have been influential in the decision to bring José Mourinho back to Stamford Bridge in 2013.