Jonathan is a partner at BSB solicitors, a firm that he established over 20 years ago in Bloomsbury. He has a special interest in criminal defence, extradition and human rights. He has campaigned on justice issues for most of his career and more recently was President of the London Criminal Courts Solicitors Association.

Jonathan has been a Trustee of HIAS+JCORE since 2019 and is keen to ensure that the Jewish voice on racial justice issues is heard.