when you handed in your previous I-94 they have a record of you leaving US, returning to Canada.
are you flying in for the interview or driving?
bring a copy of interview request letter/email, copy of hotel reservations/ rental car reservations, etc. in case they ask for it.
when the CBP asks for purpose of visit and length of stay, tell them for a job interview and how long your will be staying (a few hours or days), they will admit you on B2 status (business), very unlikely you will go to secondary inspection.
as long as you did not break any previous immigration rules, there should be no reason to deny entry.
they may ask a few questions to ensure you return to Canada after your interview, but very unlikely. be honest.
what do you mean by the comment "GC is 2-3 years away" in original post ?