London First is a non-profit membership body representing around 140 businesses, many of which come from the property, transport, banking and retail sectors. Several London higher education institutions are also members.
It is campaigning for greater airport capacity in the South East, more housing supply and more devolution of powers and funding to the capital.
McIvor stepped down from the position following a bicycle accident in order to recover before pursuing other projects.
Bacon will oversee the organisation’s comms and events functions ahead of the next general election.