H1 B Visa Stamping Question: Canada Tourist Visa

Hi All

Curently ,I am employed with Company A on H1B Visa valid till September 2014. I am planning to visit Canada to get my H1 B Visa stamped.Prior to that I am travelling to NY sometime next week for vacation and was thinking to get my toruist visato canada from the NY canadian consulate. And I have the following question in this regard:
Let us say I am able to get my Canadian visitor visa . However, if a new company offers me position, do I have to apply for my canadian visitor visa again? I am asking this because when I got approved for canadian visitor visa or tourist visa , I was with comapny A. However, do I have to get a new visitor because my employer changed. Therefore, will it be a fresh application again?