Board of Directors

Jonathan Weisstub, Chairman of the Board
Jonathan Weisstub is a founding partner of Common Wealth. He specializes in strategy, transaction structuring, and the interface between the public and private sectors. Jonathan is a lawyer and former senior advisor to the Prime Minister of Canada with senior executive experience in government, professional services, and the corporate sector. As Assistant Deputy Minister at the Ontario Ministry of Finance and Executive Vice President at Infrastructure Ontario, he led government-wide expenditure management exercises and major transactions related to public assets. He worked as a corporate lawyer at Stikeman Elliott, specializing in securities, fund formation, mergers and acquisitions, and private equity. He is a licensed lawyer in both Ontario and New York. A graduate of McGill, Oxford, and the University of Toronto Law School, Jonathan is chair of the board of the Halifax International Security Forum, one of the world’s leading forums on international security. He is also a Senior Resident at Massey College at the University of Toronto.

Jonathan Tepperman, Vice Chairman of the Board
Jonathan Tepperman is the Editor-in-Chief of Foreign Policy magazine and author of the book, The Fix: How Countries Use Crises to Solve the World’s Worst Problems (Crown, September 2016). From 2011 until August 2017, he was the managing editor of Foreign Affairs magazine. Jonathan has spent twenty years working on international affairs as an editor, writer, and analyst. He started his career working as a speechwriter at the UN in Geneva, Switzerland. After stints as a foreign correspondent, he joined Foreign Affairs as a junior editor. He later moved to Newsweek International, where he was deputy editor, and then worked as a political risk consultant before returning to Foreign Affairs in January 2011. Jonathan has written for a range of publications, including Foreign Affairs, the New York Times, the Washington Post, the Wall Street Journal, the Atlantic, the New Republic, and others, on subjects ranging from international affairs to books to municipal politics to food. Jonathan has interviewed more than a dozen world leaders, including Syria’s Bashar al-Assad, Japan’s Shinzo Abe, Brazil’s Luiz Inacio Lula da Silva, Mexico’s Enrique Peña Nieto, Indonesia’s Joko Widodo, and Rwanda’s Paul Kagame. He is the coeditor of the books The U.S. vs. al Qaeda (2011), Iran and the Bomb (2012), and The Clash of Ideas (2012).

Ahmet Taçyildiz, Treasurer of the Board
Ahmet Taçyildiz is Treasurer of the Board at Halifax International Security Forum. Ahmet has been the founding chairman of Ant Holding and the chairman of GAP Insaat, a global construction company. As an accomplished businessman, entrepreneur and investor, Ahmet has been executing on global strategic opportunities for the holding companies and multiple start-up ventures and NGOs he is leading. Ahmet has been an active member of various Committees and Councils in the past years including the Turkish American Businessmen Association (TABA- AmCham) as the Vice President, the Foreign Economic Relations Board (DEİK) of Turkey and Turkish Industry and Business Association (TUSIAD). Ahmet holds BA in Business Administration.


Major General (Ret.) Tammy Harris, Board Member
Tammy Harris retired from the Canadian Armed forces in January 2018 as Deputy Commander of the Royal Canadian Air Force (RCAF) and is the first woman to hold the position. Throughout her distinguished 30-year military career, Tammy has been a trail-blazer and champion for women in the military. In 2007, she became the first woman to command an RCAF wing: 9 Wing Gander in Newfoundland and Labrador. This commandment was followed by a deployment to Afghanistan as the commanding officer of the Canadian Element Roto 8 for the commander of the Kandahar Airfield and the chief J5 planner for NATO at the air base. In 2012 she became the first woman to command a major Canadian Armed Forces base: Canadian Forces Base Borden, Ontario. Along with responsibility for Canada’s largest training base came command of Canadian Forces Support Training Group at Borden. She began her military career in 1987 as an air traffic controller, immediately following her graduation as valedictorian from Acadia University. Tammy is a native Bluenoser and grew up in Kings County, Nova Scotia.

Cindy Hensley McCain, Board Member
Cindy Hensley McCain has dedicated her life to improving the lives of those less fortunate both in the United States and around the world. As the Chairman of the Board of the McCain Institute for International Leadership at Arizona State University, she oversees the organization’s focus on advancing character-driven global leadership based on security, economic opportunity, freedom and human dignity. Cindy also chairs the Institute’s Human Trafficking Advisory Council. She cares deeply about this issue and is committed to ending human trafficking and supporting victims in Arizona, the United States and around the world. Through her work with the McCain Institute, several partnerships have been formed with anti-trafficking organizations working on solving various aspects of the problem. She also serves as co-chair of the Arizona Governor’s Council on human trafficking. In addition to her work at the McCain Institute, she serves on the Board of Directors of Project C.U.R.E and the Advisory Boards of Too Small To Fail and Warriors and Quiet Waters. Cindy holds an undergraduate degree in Education and a Master’s in Special Education from USC and is a member of the USC Rossier School of Education Board of Councilors. Cindy is the Chairman of her family’s business, Hensley Beverage Company, which is one of the largest Anheuser-Busch distributors in the nation. Cindy is the wife of the late U.S. Senator John McCain. Together, they have four children.