Prior to going into private practice in 1990, Pierre spent ten years at the Federal Department of Justice, where his main client was the Department of National Revenue, including two years on secondment to the Department of Finance.

He represents the firm's clientele in the contexts of tax audits and objections as well as appeals before the Tax Court of Canada, the Federal Court, Trial Division and Federal Court of Appeal.

Insofar as international tax issues are concerned, Pierre acts for a number of multinationals and accounting firms in various areas concerning fiscal issues, including transfer pricing, foreign accrual property income (FAPI) and the general anti-avoidance rule.

He also acts for the firm's domestic and international clients to propose and implement effective tax planning strategies.

A former President of the Tax Division of the Canadian Bar Association (Quebec), Pierre is also a Member of various professional associations, including the Canadian Tax Foundation, the International Fiscal Association and the Association de planification fiscale et financière (APFF). He is also an associate member of the American Bar Association, Taxation Division.

He is a frequent contributor and speaker on a variety of tax-related topics.

Pierre is listed in Best Lawyers in Canada and Lexpert in the field of tax litigation.