Jacob is a specialist registrar in general adult psychiatry carrying out his training at the South London and Maudsley (SLaM) NHS Foundation Trust. He has an interest in the interface between mental health and green spaces having organised and implemented green-space walking groups for patients and staff. In 2018-19 he worked with CSH to establish the Green Walking Project to promote and facilitate green-space walking groups for psychiatric inpatients, in partnership with the Royal College of Psychiatrists. He continues to support this and other work through his role as CSH Associate.