| 2012-present | Cancer Care Ontario Strategic Analysis Advisory Panel | Member |
| 2012-present | Health Systems (Journal) | Member of Editorial Board |
| 2012-present | Journal of Operations Research in Health Care | Member of Editorial Board |
| 2011-present | IIE Transactions on Healthcare Systems Engineering | Member of Editorial Board |
| 2010-present | Institute for Industrial and Systems Engineering | Member |
| 2010-present | Society for Health Systems (IISE) | Member |
| 2006-present | Health Systems and Planning Program theme group at the Institute for Clinical and Evaluative Sciences (ICES) | Member |
| 2001-present | Health Care, Technology and Place Training Program | Mentor Team Member |
| 1999-present | EURO: ORAHS (Operations Research in Applied Health Services) | Canadian Representative |
| 1997-present | Nursing Effectiveness, Utilization and Outcomes Research Unit | Co-Investigator |
| 1987-present | Canadian Operational Research Society (CORS) | Toronto Student Chapter Faculty Advisor |
| 1982-present | Canadian Operational Research Society (CORS) | Member |
| 1982-present | INFORMS (Operations Research and Management Science) | Member |
| 2021-2023 | INFORMS Healthcare Conference 2023 | General Co-chair |
| 1998-2022 | Journal of Health Care Management Sciences | Member of Editorial Board |
| 2021 | Society for Health Systems (Society within IISE) SHS Academic Committee | Member |
| 2020 | Federal Task Force on optimal use of health system’s capacity / expert group on health systems | Member |
| 2017 | Cancer Care Ontario: Strategic Analytics | Scientific Lead |
| 2016-2017 | Ontario Ministry of Health and Long Term Care | “Scholar in Residence” |
| 2006-2015 | Regenstrief Centre for Healthcare Engineering – Purdue University | Advisory Board Member |
| 2012-2014 | Baycrest Hospital: Clinical Strategy, Quality and Safety Committee | Member |
| 1995-2010 | PATAT (Practice and Theory of Automated Timetabling) | Steering Committee |
| 2008 | Operations Research in Applied Health Services (ORAHS) Annual Conference – Toronto | General Chair |
| 2007 | Interfaces Special Issue on “Applications of Management Science and Operations Research Models and Methods to Problem in Health Care” | Co-editor |
| 2006-2007 | Provincial Waitlist Initiative | Surgical Process Analysis & Improvement Expert Panel Member |
| 1997-2007 | Journal of Scheduling | Member of Editorial Board |
| 2006 | CORS annual conference | Healthcare Stream Organizer |
| 2006 | CORS Grad Workshop – Montreal | Organizer |
| 2006 | INFORMS – Health Applications Section | Chair |
| 2006 | Ministry of Health and Long Term Care: Sustainability Through Supply Management Editorial Board Committee | Member |
| 2006 | Operations Research in Applied Health Services – ORAHS – Wroclaw, Poland | Member |
| 2006 | PATAT ‘06 | Member of Program Committee |
| 2006 | Research Workshop on Emergency Department Operations – Montreal | Co-organizer |
| 2001-2004 | Centre for Applied Health Informatics; Sunnybrook & Women’s College Health Science Centre | Associate Director |
| 2004 | PATAT ’04 | Member of Program Committee |
| 2003 | Project Hope | One week course in Health Care Quality for Hospital Middle Management: Czech Republic |
| 2003 | Project Hope | One week course in Health Care Quality for Hospital Middle Management: Hungary |
| 2002 | Canadian Operational Research Society (CORS) | Program Chair for National Meeting |
| 2002 | PATAT ’02 | Member of Program Committee |
| 2002 | Project Hope | One week course in Health Care Quality for Hospital Middle Management: Estonia |
| 2002 | Project Hope | One week course in Health Care Quality for Hospital Middle Management: Latvia |
| 2000 | HealNET | Health Informatics R&D Curriculum Development Working Group |
| 2000 | PATAT ’00 | Member of Program Committee |
| 1996-1997 | PATAT ’97 Conference – Toronto | General Chair |
| 1995 | ICPTAT ’95 Conference – Edinburgh, Scotland | Member of Program Committee |
| 1987-1991 | Operations Research | Associate Editor |
| 1990 | Canadian Scheduling Workshop – U of Toronto | Organizer |
| 1987-1989 | Canadian Operational Research Society (CORS) | Elected Member of the National Council |
| 1986 | Canadian Operational Research Society (CORS) | Program Chair for the National Meeting |
