Prior to establishing Mitchell Consultancy Services, Stewart had extensive experience in training, human resource development and consulting with tafeSA. Stewart specialises in services to the public and private sectors, primarily in the areas of strategic planning, leadership development, organisational change, strategic facilitation and team development. The philosophy which underpins the delivery of those services is the achievement of optimum performance through individual and team empowerment, the development of positive workplace cultures and community engagement.

Stewart has undertaken overseas consultancy assignments in the United Kingdom, USA, Hong Kong, India, Sri Lanka, China, Malaysia, Philippines, Fiji, New Guinea, Brunei, New Zealand and South Africa. He has delivered workshops and seminars for the Australian Institute of Management and the American Society of Training and Development and has presented at numerous national conferences.