Hello Bob. thanks for your question.
The surveying industry in Ontario is governed and regulated by the Association of Ontario Land Surveyors (www.aols.org). Surveyors hold a quasi-judicial "role" meaning that while they are paid by clients to do work, their opinions regarding boundaries are impartial. Therefore providing that the surveyor you select is a member in good standing of the AOLS, you should be getting top quality results.
To be certain, do your due diligence and ask for references if you so choose.