He kaiwhakatau, he kaiwhakawā hoki a Andrew i raro i te Ture Kirimana Hanga 2002. I te tau 2018 i whakawhiwhia ia e AMINZ ki te tohu a Sir Ron Davison mō te tuhi tohu. He mema ia nō ngā rōpū whakatau me te whakawakanga o AMINZ, The Building Disputes Tribunal Limited me te New Zealand Arbitration Centre. He maha ngā whakatau me ngā whakawakanga kua noho ia ki roto i ngā take hanga, he mema hoki ia nō te Dispute Review Board Foundation, ā, he mema hoki ia nō te DRB. Kua whakatūria hoki a Andrew hei tohunga i raro i ngā kirimana āhua paerewa, ā, tata ki te 30 ngā whakawakanga piira i noho ia hei Mema mō te Kaunihera Inihinia Ngaio Chartered.
Ko Andrew anō te kaiwhakatau i ngā tautohe mō te rīhi me te taitara o ngā whare pēnei i te arotake reti, ngā tautohe e pā ana ki ngā tikanga me ngā take pakarukaru.
Ka whakaaetia ngā whakaritenga takawaenga ina whai hua ngā pūkenga hanga a Andrew.