Christopher practises tax law with particular expertise in the area of corporate restructurings and acquisitions involving Canadian businesses. He also provides advice with respect to the special corporate tax requirements of financial services, products and institutions.  Christopher regularly advises on the income tax aspects of complex domestic and cross-border financings, and financial instruments including derivatives, securities lending and collective investment funds. Christopher also has expertise with respect to transfer pricing and the successful resolution of disputes with Canadian tax authorities.

Christopher was recognized as one of Canada’s leading tax lawyers by The Best Lawyers in Canada 2009. In addition, the Practical Law Company’s "PLC Which Lawyer?" has identified Christopher as a recommended tax partner in Canada.

In addition, Christopher is the manager of the Toronto tax group.