Halsall is a Canadian consulting engineering company with a passion for sustainability. The company was founded in 1956 by Robert Halsall. Under the direction of Past President Peter Halsall (1995-2011), the company grew to nearly 400 employees with offices in Vancouver, Calgary, Burlington, Toronto, Richmond Hill, Sudbury, Ottawa and Washington, D.C.. Current President Michael Van Dusen has been with Halsall since 1985.