Before her appointment to the bench, O'Connell was Director, Family Law Services for the Greater Toronto Area at Legal Aid Ontario, a senior management role she held from at least 2006 through 2010 (opengovca / Legal Aid Ontario records; LinkedIn).
The 2010 Judicial Appointments Advisory Committee report notes that, of the three judges appointed to the Ontario Court of Justice that year, one came "from government" — consistent with her move from the publicly funded Legal Aid Ontario to the bench (JAAC 2010 Annual Report).