Warren started his career in local government as a neighbourhood housing officer nearly 30 years ago before moving into policy and strategy roles.

Warren joined the NHS in 2006 and has been Director of the Association of Greater Manchester PCTs (developing joint commissioning and leadership arrangements across the NHS) and Director of Policy & External Relations for NHS Greater Manchester.

In 2012 Warren joined NHS England as the Greater Manchester Area Team’s Director of Operations & Delivery with responsibility for performance, system planning and emergency preparedness.

Since 2014 Warren has played a central role to bring devolved powers and budgets to Greater Manchester and was previously the Executive Lead Strategy and System Development for the Greater Manchester Health and Social Care Partnership supporting the development of integrated care across the ten districts.

Warren is also a Trustee of Greater Sport, the county sports partnership for Greater Manchester and a Director of FC United of Manchester, a fan-owned football club.