Forrest is a leading counsel in transportation and related litigation in Canada. He was in-house regulatory litigation counsel for Canadian National Railway Company (1978-1985) and Canadian Pacific Railway Limited (1985-1993) in their respective headquarters in Montreal, following which he returned to private practice, focusing on railway litigation across Canada  representing shippers, ports, terminals, all levels of government, short line railways and commuter rail authorities. In 1998 he moved his practice to Vancouver and opened a prominent boutique firm. He joined Davis LLP, now DLA Piper (Canada) LLP as a partner in 2013, where he is currently co-chair of the firm’s Rail Transportation Group.

In his practice, Forrest appears frequently before federal courts and tribunals in cases involving issues of significance to stakeholders in the rail transportation industry. He has been counsel on many of the leading transportation cases involving the rail industry in Canada in the past 40 years, and has been widely recognized by his peers as a leader in this area of the law that is of such importance to Canadian business and the economy. 

A particular focus of his practice is on assisting clients to achieve reasonable freight rates and improved rail service from the Class I railways. On the freight rate side, he has acted as counsel on the majority of the freight rate cases taken against the railways in Canada under the Canada Transportation Act since the remedy was enacted in 1988. On the service side, his litigation of level of service and service level arbitration cases before the Canadian Transportation Agency and the courts has established leading precedents in the jurisprudence.