About us

“When I joined the South Thames Regional Action Team in 1999 as Junior Doctors’ Adviser, it was immediately apparent that trusts required professional IT solutions to deal with the challenges posed by the New Deal and Working Time Directive. Now, eight years on, I feel proud and confident that Zircadian is helping the NHS meet these challenges, and many others, head-on.”

Dr Henry Carleton, Managing Director

“Zircadian is rightly proud of its significant role in promoting safer working lives for junior doctors during the last eight years. Through our commitment to developing systems that ease the administrative workload, by replacing paper with technology and providing better information, I feel certain we will continue to improve the working lives of all hospital doctors.”

Dr Angus MacDougall, Director

Henry established Zircadian Ltd in 2000 to provide expert support to hospitals, to help them manage their doctors more effectively. Henry trained as a junior doctor at Bart’s and the Royal London, where he developed an interest in effective medical resource management. In 1999 he joined the Thames Regional Action Team as Junior Doctor’s Advisor, where he helped trusts tackle the challenges of rota design and the New Deal. Henry is a member of the Institute of Directors.

Having studied biology at Southampton University, Angus studied for a doctorate in the evolution of animal signals at New College, Oxford.

A further three years was spent training as an auditor with Arthur Andersen, London before helping to start Zircadian in 2000.

Angus is a member of the Chartered Institute of Marketing and the Institute of Directors.

Dr Masood Ahmed, MBBS, is one of a handful of medics with a detailed knowledge of the European Working Time Directive (EWTD) and the New Deal contract for doctors in training. He is the author of 'Rota Design 2009' and 'A Compendium of Solutions for Implementing the Working Time Directive for Doctors in Training from August 2009'. As Associate Medical Director of the West Midlands Deanery Action Team he was the Deanery lead for the first stage of implementing the EWTD for over 4,000 junior doctors. As Chairman of the BMA Junior Doctors' Committee Negotiating Team, he led on the current Specialist Trainee pay scales negotiations. He has worked in close partnership with the Skills for Health Workforce Projects Team and the NHS North West EWTD Medical Development Team, in tackling the challenges of the EWTD.