[4] Before his election to parliament, Joseph was the head of nursing for community mental health services at Kent and Medway NHS and Social Care Partnership Trust.

[5] In May 2023, Joseph was elected as a Labour councillor for the Aylesford & East Stour Ward of Ashford Borough Council.

[6] He stepped down as councillor in September 2024,[2] and the Labour lost the seat to the Green Party in the subsequent by-election.

[8] On 23 July 2024, he made his maiden speech in the House of Commons during a debate on immigration and home affairs.

[9] Joseph opposed Kim Leadbeater's bill introducing assisted suicide into law and served on the committee examining the legislation[10].