The SMC CO's interview that you hear about often is all to allow the CO to judge if an applicant is likely to be offered a job, and will be able to settle into NZ life, so they don't need to ask you, like anyone else with a job, that kind of thing, since you've already done it.
The only thing you might get your CO directly asking you about (and possibly your employer as well) is the detail of what your responsibilities are at work, so as to check that they match up with the ANZSCO description of the role.