This information is taken from the NZIS Operations manual. It clearly sets out what is and isnt classed as skilled work, suitable for eligibility under the Skilled Migrant Category:

SM7.10 Skilled employment
Skilled employment is employment that requires significant specialist, technical or management expertise:
obtained through the completion of recognised qualifications; or
obtained through work experience that has enabled a person to gain a comparable level of skill to that which would have been gained through the completion of a relevant recognised qualification; or
developed through work experience in which that expertise was a key component.
An offer of employment or current employment in New Zealand will therefore be assessed as skilled employment if:
it is relevant to the principal applicant's* recognised qualification; or
the employer considers, and the NZIS is satisfied, that the employment requires significant technical, specialist or managerial expertise that the principal applicant has obtained through relevant previous work experience in which that expertise was a key component.
Generally, despite (a) and (b) above, employment in occupations described in the following Major Groups of the New Zealand Standard Classification of Occupations is not assessed as skilled employment unless the NZIS is satisfied that:
there is a special case for recognising the contribution of that employment to New Zealand' s economic growth and capacity; or
the principal applicant's employment will enhance the quality of New Zealand's accomplishments and participation in that occupational area because the principal applicant* has an international reputation and record of excellence in that occupational field:
Major Group 3 (Technicians and Associate Professionals) except those Group 3 occupations listed in (d) below
Major Group 4 (Clerks)
Major Group 5 (Service and Sales workers)
Major Group 6 (Agriculture and Fishery workers)
Major Group 8 (Plant and machine operators and assemblers)
Major Group 9 (Elementary occupations).
Employment in occupations described in the following Major Groups of the New Zealand Standard Classification of Occupations is assessed as skilled employment if it meets the requirements for skilled employment set out in (a) and (b) above:
Major Group 1 (Legislators, administrators and managers)
Major Group 2 (Professionals)
Major Group 7 (Trades workers)
Major Group 3 (Technicians and Associate Professionals) in the following occupations:
31111
Physical Science Technician

31515
Agricultural Inspector

31121
Quantity Surveyor

31516
Quality Inspector

31122
Quantity Surveyor's Technician

32111
Life Science Technician

31123
Clerk of Works

32112
Medical Laboratory Technician

31124
Other Civil Engineering Technician

32121
Agricultural Technician

31131
Electrical Engineering Technician

32122
Forest Technician

31141
Telecommunications Technician

32211
Dispensing Optician

31142
Computer Systems Technicians

32221
Dental Therapist

31143
Other Electronics Engineering Technician

32231
Physiotherapist

31144
Avionics Technician

32232
Occupational Therapist

31151
Mechanical Engineering Technician

32233
Osteopath

31161
Chemical Engineering Technician

32236
Chiropractor

31191
Other Engineering Technician

32234
Orthotist / Prosthetist

31192
Non Destructive Testing Technician

32235
Podiatrist

31211
Computer Programmer

33171
Valuer

31213
Computer Support Technician

33411
Social Worker

31331
Medical Radiation Technologist

33413
Case Worker

31332
Other Medical Equipment Controller

33412
Probation Worker

31333
Sonographer

33421
Employment Programme Teaching Associate Professional

31411
Ships' Engineer

33612
Reporter

31421
Ships' Officer (Deck) including Master

33613
Editor

31422
Launch Master

33614
Sub-Editor

31423
Other Ships' Deck Officer and Pilot

33631
Graphic Designer

31431
Aircraft Pilot and Flight Crew

33632
Fashion Designer

31433
Flying Instructor

33634
Interior Designer

31434
Helicopter Pilot

33644
Singing and Music Teacher

31441
Air Traffic Controller

33652
Dancing Teacher and/or Choreographer

31511
Safety Inspector

33662
Artistic Director

31512
Meat Inspector

33811
Acclimatisation Field Officer

31513
Noxious Weeds/Pest Inspector

33812
National Park Ranger

31514
Health Inspector




SM7.10.1 Relevance of qualification(s) to employment

Qualifications are relevant to employment if the employer considers, and a visa or immigration officer is satisfied that:

The major subject area of the principal applicant's* recognised qualification is directly applicable to the employment, or
The employment is in an occupation for which a core requirement is a qualification at the academic, trade or technical level of the principal applicant's recognised qualification.
Note: For the purposes of this provision, 'qualifications' must meet the requirements for recognition set out in SM14. 5 but are not required to be the same qualification(s) that qualifies for points under the Qualifications part of this policy (see SM14).

SM7.10.5 Relevance of work experience to employment

Work experience is relevant to employment if the employer considers, and a visa or immigration officer is satisfied that:

the work experience is directly applicable to the employment; and
the offer of employment could not reasonably have been made or the employment could not reasonably have been undertaken if the applicant did not have that work experience.
Effective 17/12/2003