E-Verify Mandated for Public Works Contractors and Subs in Pennsylvania, January 1, 2013 By Catherine V. Wadhwani on July 11, 2012 Pennsylvania requires public works contractors and subcontractors to begin using E-Verify as of January 1, 2013. Continue Reading E-Verify Mandated for Public Works Contractors and Subs in Pennsylvania, January 1, 2013