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 Director at the Sandra Rotman Centre at University Health Network and Professor of Medicine at University of Toronto. more

Dr. Singer is Foreign Secretary of the Canadian Academy of Health Sciences and chaired the Academy’s assessment on Canada’s Strategic Role in Global Health. In 2014, he was named Co-Chair of Every Woman Every Child’s Innovation Working Group, which is aimed at harnessing the power of innovation to accelerate progress towards achieving the health-related Millennium Development Goals. He has advised the Bill & Melinda Gates Foundation, the UN Secretary General’s office, the Government of Canada, Pepsico, BioVeda China Venture Capital Fund, and several African Governments on global health.

Dr. Singer was appointed an Officer of the Order of Canada in 2011 for his contributions to health research and bioethics, and for his dedication to improving the health of people in developing countries. In 2007, Dr. Singer received the Michael Smith Prize as Canada’s Health Researcher of the Year in Population Health and Health Services. He is a Fellow of the Royal Society of Canada, the Canadian Academy of Health Sciences, the U.S. Institute of Medicine of the National Academies, and The Academy of Sciences for the Developing World (TWAS).

Dr. Singer has published over 300 research articles, received over $50 million in research grants, and mentored hundreds of university students. Along with Dr. Abdallah Daar, he co-authored The Grandest Challenge: Taking Life-Saving Science from Lab to Village. 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. He has served his community as Board Chair of Branksome Hall, an acclaimed and internationally-minded school for girls.


Jocelyn Mackie

Jocelyn Mackie MSc, JD

Vice President 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

Vice President of Programs

Twitter @KarleeSilver

Karlee Silver is the Vice President of Programs for Grand Challenges Canada. Dr. Silver leads the Stars in Global Health, Saving Lives at Birth, Saving Brains and Global Mental Health programs. She is a member of the Knowledge Exchange Working Group for the Canadian Network for Maternal, Newborn and Child Health.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.

Executive Vice President

Twitter @TaylorAndrew1

Andrew D. Taylor is Executive Vice President of Grand Challenges Canada and is responsible for the Stars in Global Health and Transition to Scale programs. 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 on 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. Mr. Taylor has been working with Dr. Peter Singer and Mr. Joseph Rotman at the Sandra Rotman Centre and Grand Challenges Canada for the past 10 years. Prior to that, Mr. Taylor worked overseas in the biotech industry with a focus on sales, marketing and business development. 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 Dr. Singer, Dr. Daar and Ms. Mackie

Executive Assistant to Dr. Silver and Mr. Taylor

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