Most work visas require a job offer from a New Zealand employer. People holding work visas need to reapply at least 2 months before their current visa expires to avoid drama.
In many cases jobs need to be re-advertised even if a work visa holder is already in the job.
Work Visa decline rates have trended upwards but by getting the application right first time it will increase getting the approval.
Expect some changes to the rules later this year around how the labour market test will work.