Following the 1990 election, Hart continued to practice commercial and regulatory law and became accredited as a mediator (Harvard) and facilitator. In 1994 she was tapped to lead the Ontario Supreme Court's Alternative Dispute Resolution Pilot Project, which successfully provided an alternative to trial-based civil litigation, resolving more than half of the cases sent to it, before examinations for discovery. Hart joined KPMG as a partner in 1996, and in May 1997, she became president of KPMG Conflict Solutions Inc., a company specializing in conflict management services. In 1998 Hart founded Accord/hart & associates inc., a firm offering a comprehensive conflict management services across Canada, and she continues as its president resolving business and governance conflicts.