Mark Dean is the founder and Chair of En Masse and co-founder of the behaviour change app On a Roll 21. In addition to his work as a mental health program developer and facilitator, Mark is also a qualified lawyer and conflict resolution specialist with expertise across the full spectrum of mental health and wellbeing at work, from prevention and promotion through to crisis management. Mark has delivered workshops to thousands of people in workplaces in Australia and overseas in the areas of mental health and wellbeing for managers, building resilience and more broadly reducing psycho-social risks at work. Mark is also an experienced board member and an advisor to large corporates and government leadership teams. He uses a blend of best practice in risk minimisation and governance as well as positive psychology based techniques that help people to achieve their full potential while contributing to the building of respectful, inclusive workplace environments.