What INZ would consider relevant work experience would vary, depending on what evidence he can show from past employers about the exact nature of his responsibilities.
http://onlineservices.immigration.go...nual/30545.htm See SM7.10 and SM7.15.
Unfortunately, PAR is not at all reliable as an indicator. NZQA just go by the name of the qualification as entered by the applicant on the form. For the proper application, the IQA is required. That investigates the course leading to the qualification - what topics were covered, for how long, and to what depth. That information is then compared with courses currently running in New Zealand. The first investigation decides what Level the foreign qualification can be awarded, and the second, what it is stated to be comparable with. These outcomes can be totally different from what came up at PAR.