Same Company but multiple designations-Need help for work history update

Hi Friends

ECA result is 4 years B.Tech is in Electronics and Communication. I have 10 years of experience in Network planning and operations in the same company. I got two promotions during this tenure time.
Also, i got officially transferred to onsite location-Australia.

The best NOC code for me is 2147- Computer engineers (except software engineers and designers). As my whole experience is technical domain only.

My issue is “Can I mention only one NOC code 2147 for whole 10 years including onsite location with latest designation” or shall i create multiple references in EE for each promotions of designation but my role and responsibilities are similar to NOC 2147 for each title.

I need your advice.

  1. Pls suggest if I use NOC 2281 – Computer network technicians for initial 2 years of job then will it be fine with my Degree which is Electronics and Communication. thanks