He rōia a Simon Jass, he takawaenga whaimana hoki, he tohunga ki te whakatau tautohe ā-iwi me te arumoni.

I muri i tana tīmatanga i tana mahi i te tau 2004 hei rōia iti i roto i ngā rūma ture, i uru atu ia ki te tīma whakatau tautohe i tētahi umanga ture ā-motu i te tau 2009. I a ia e mahi ana hei kaiwhakapae matua, i aro atu a Simon ki te whānuitanga o ngā tautohe ā-iwi me ngā tautohe arumoni, ngā take kore moni a ngā kamupene me ngā whakawakanga ture. I uru atu ki tēnei ngā whakawakanga i roto i ngā Kōti Matua e pā ana ki te Kaupapa ACC me te Ture Utu Aituā 2001, me te tuku tohutohu mō te pānga o taua mea. I tīmata ia ki te mahi i runga i tana ake pūkete i te tau 2023.

E rua tekau tau a Simon e mahi ana i roto i tana mahi ture, ā, kei te tautoko tonu ia i te whakamahinga o te ADR. Hei mema nō te Arbitrators' and Mediators' Institute of New Zealand (AMINZ), he huarahi atawhai, whai hua hoki tā Simon ki ia takawaenga, e āwhina ana i ngā rōpū ki te whakahaere i te tautohe, me te whāinga kia tutuki he whakataunga i roto i ngā whiriwhiringa.

He mema anō hoki a Simon nō te NZ Bar Association, te NZ Law Society, te Resolution Institute, te RITANZ me te Society of Construction Law NZ.