He then became a senior partner at Clark Drummie & Company working in the area of corporate, commercial and securities law, including lead counsel to a large power utility, New Brunswick Power, while also teaching business law at the Business School at the University of New Brunswick from 1984 to 1993.

In May 2018 he was named Counsel and Strategic Advisor for the International Law firm McCarthy Tetrault and was on the board of Lester B Pearson College of the Pacific and Chairs the board of the London Goodenough Association of Canada In 1993, he was first elected to the House of Commons as the Member of Parliament for the riding of Fundy Royal, New Brunswick.

Upon his return to the private sector in 1997, Zed co-founded a public policy and business advisory company in Ottawa, Summa Strategies Canada Inc., and served as its President for eight years representing some of the largest American and Canadian companies and their CEO's with offices in Ottawa, Washington and London.

In September 2009, he was appointed Chairman of the President's Advisory Board for Cisco Systems Canada with head offices in Toronto.

Zed is also very active in Canadian and Atlantic Canada legal and community affairs, including a member of the Board of Directors of Enterprise Saint John, the United Way of Greater Saint John, Finance Chair for Romero House soup kitchen and a founding member of the Lily Lake Pavilion Restoration Committee.

He has also served as a Director of the Aitkin Bicentennial Exhibition Centre, Special Olympics Canada, Canadian Cancer Society National Public Relations, the Board of Advisors of the International Association for Students of Economic and Commerce, the National Committee on Lobbyists for the Canadian Bar Association (CBA), Life President and class Valedictorian of Dalhousie University, Friends of the London School of Economics, Chair London Goodenough Association of Canada, Board of Governors and Secretary, Patron of Lester B.Pearson College of the Pacific, Victoria, B.C.