 He nevertheless continued in this role until the resignation of Hartcher following a raid by corruption authorities in December 2013.Humpherson gained further attention when he took up a consulting role with the NSW Minerals Council two months after Hartcher's resignation, an action against a 2010 recommendation of the Independent Commission Against Corruption (ICAC) that former staff of ministers and parliamentary secretaries be banned for a year from lobbying activity "relating to any matter that they had official dealings within their last 12 months in office".Since 2015 he has been a Director of Barton Deakin, a Liberal-aligned lobbying firm founded by his former parliamentary colleague, Peter Collins.