The new brief aims to raise the profile of The JLC's work within the Jewish community and the wider public. It will involve public affairs and campaigning activities.
The JLC is an umbrella body made up of more than 30 Jewish communal organisations, including synagogues, care organisations and education charities.
The JLC’s chief executive Simon Johnson said: "[The PR Office’s] knowledge of and expertise within the Jewish community are unparalleled."
Shimon Cohen, chairman of The PR Office, said: "The JLC’s work is of vital importance to the Jewish community and it will be a privilege to assist in raising their profile within the community and society at large."