Campbell has co-founded several Internet and technology companies, including Internet Direct, the domain registrar Tucows, and Hostopia, a website hosting and service provider now owned by Deluxe.[2][3] He served as Internet Direct's chief executive officer (CEO) from 1994 to 1999 and Tucows' CEO from 1997 to 1999.[4] Campbell is a founding member of the Canadian Internet Registration Authority (CIRA) and served on its board of directors from June 2001 to January 2003.[2][4] He served Hostopia's president from November 2005 to April 2006 and CEO from January 2001 to February 2008.[4] He is a former director of the Canadian Association of Internet Providers (CAIP).[2]