Our People


Peter A. Singer

Peter A. Singer OC, MD, MPH, FRSC

Chief Executive Officer of Grand Challenges Canada

Twitter @PeterASinger

Peter Singer has dedicated the last decade to bringing innovation to tackling the health challenges of the world’s poorest people. He is well known around the world for his creative solutions to some of the most pressing global health challenges. Dr. Singer is Chief Executive Officer of Grand Challenges Canada. He is also Professor of Medicine at University of Toronto, Director at the Sandra Rotman Centre at University Health Network, and Foreign Secretary of the Canadian Academy of Health Sciences. more

In 2007, Dr. Singer received the Michael Smith Prize as Canada’s Health Researcher of the Year in Population Health and Health Services. In 2011, Dr. Singer was appointed an Officer of the Order of Canada for his contributions to health research and bioethics, and for his dedication to improving health in developing countries. In 2014, he was named by the UN Secretary General’s Office as Co-Chair of the Every Woman Every Child Innovation Working Group. Dr. Singer is a Fellow of the Royal Society of Canada, the Canadian Academy of Health Sciences, the U.S. National Academy of Medicine, and The Academy of Sciences for the Developing World (TWAS). Dr. Singer has published over 300 articles and mentored hundreds of students and staff. He studied internal medicine at University of Toronto, medical ethics at University of Chicago, public health at Yale University, and management at Harvard Business School.


Jocelyn Mackie

Jocelyn Mackie MSc, JD

VP Operations & General Counsel

Twitter @Jocelyn_Mackie

Jocelyn E. Mackie is VP Operations & General Counsel at Grand Challenges Canada where she oversees the Finance, Operations, Legal, and Communications teams. While providing operations, legal and strategic advice, Ms. Mackie is focused on maintaining efficient and effective operations and mitigating risks facing the organization.more

As part of the senior leadership team, Ms. Mackie also helps support the Stars/Scaling and Targeted Challenges teams in enabling innovators who are focused on Bold Ideas with Big Impact in global health, as well as working with partners to leverage the investments Grand Challenges Canada is making. Ms. Mackie is also Secretary of the Grand Challenges Canada Board of Directors.

Prior to joining Grand Challenges Canada, Ms. Mackie provided legal and strategic advice to pharmaceutical and technology companies at a boutique law firm with offices in Toronto, Washington and New York. She specialized in intellectual property law and litigation, as well as lobbying for legislative change in Washington, Ottawa and Toronto. Ms. Mackie also consulted to the Health Impact Fund, and provided advice to the USPTO on its Patents for Humanity program. She has also worked for a multi-national pharmaceutical company.

Ms. Mackie has a MSc from the University of Toronto, where she jointly authored a book on ethical decision-making and corporate social responsibility in the bioscience industry. She has a JD from the Faculty of Law, University of Toronto, and a business degree from the Richard Ivey School of Business, University of Western Ontario. She is called to the Ontario Bar and the New York State Bar.


Karlee Silver

Karlee Silver DPhil

VP Programs

Twitter @KarleeSilver

Karlee Silver is VP Programs for Grand Challenges Canada. Dr. Silver leads the Stars in Global Health, Saving Lives at Birth, Saving Brains and Global Mental Health programs.more

Prior to joining Grand Challenges Canada, Dr. Silver trained in the laboratory of Dr. Kevin Kain at the Sandra Rotman Centre in Toronto, first as a Canadian Institutes of Health Research postdoctoral fellow, then as a MITACS Elevate postdoctoral fellow, where she helped to identify host responses of malaria infection in pregnant women to harness for diagnostic and therapeutic purposes.

Dr. Silver received her doctorate in 2006 from the University of Oxford, where she attended as a Rhodes Scholar and trained in genetics and immunology under the supervision of Professor Richard Cornall and Professor Sir John Bell. An accumulation of inspirations, including traveling through southern Africa after Oxford, led to a refocus towards global health. Witnessing both the strength of women to sustain their families and communities, and the vulnerability of these same women to the consequences of poverty inspired Karlee to apply herself to health issues of women in developing countries.

Also read ‘A focus on child development‘, the editorial Dr. Silver wrote with Dr. Singer in Science Magazine, in July 2014.


Andrew D. Taylor

Andrew D. Taylor M.Sc.

VP Investments

Twitter @TaylorAndrew1

Andrew D. Taylor is VP Investments of Grand Challenges Canada and oversees the Investment/Transition to Scale program. Leading a team of investment and scaling experts, Mr. Taylor is focused on developing and implementing a scaling strategy to translate Bold Ideas into Big Impact. more

The focus of the strategy is to catalyze “smart partnerships”, and to leverage private capital and know-how to transition bold ideas along the path to scale towards sustainable impact. As part of the senior leadership team, Mr. Taylor is also involved with developing and implementing the overall strategy of the organization.

Prior to his current role, Mr. Taylor was Executive Vice President of Grand Challenges Canada (since 2008) and a key member of the start-up phase of the organization. In this role, he led the operations of the organization and supported the development and implementation of Grand Challenges Canada programs. Mr. Taylor is a graduate of the University of Toronto and completed his undergraduate studies at the Chinese University of Hong Kong, where he studied Mandarin, Chinese culture and China’s biotechnology industry.

To learn more about how social finance can accelerate health and economic outcomes in developing countries, read a collection of blog posts authored by Mr. Taylor and follow him on Twitter @TaylorAndrew1 and LinkedIn: Andrew Taylor.


Executive Assistant to Peter Singer, Jocelyn Mackie, Karlee Silver and Andrew Taylor

Grand Challenges Canada Programs

Investment / Portfolio Managers

Program and Strategic Support

Program Coordinators



Operations and IT Support