Warren's titles include "barrister", "researcher" and "director" but his best known as a leader and innovator.
From 2009 to 2021 he was the director of Forster & Associates Limited which helped injured people by providing legal assistance and worked toward policy and legal solutions to big questions involving access to justice, the ACC system and the disability system.
Warren spent several years as an advocate specialising in the ACC system before becoming a barrister. During that time he led teams undertaking research into the ACC system, access to justice, digital transformation, accessibility and the disability system.
Warren now works withTalk - Meet - Resolve and the Tertiary Education Dispute Resolution Service to help people to transform the way they experience disputes. He also works with the Know Co which is a specialist consultancy service that helps organisations design systems to work more effectively for people.