Mathew joins London Irish from Taylormade Physio UK where he was Director and Lead Physiotherapist. Previous roles include Clinic Manager and Senior Physiotherapist for Physio Rehab Group in Auckland, New Zealand. This involved providing physiotherapy to elite, emerging and amateur athletes in varying disciplines.

Mathew was the principle physiotherapist for Manu Samoa during the 2010 and 2011 international window, including the Rugby World Cup in New Zealand and also worked with the Auckland Blues during the 2011 Super Rugby campaign.