Indian Passport with US B1/B2 Visa, Can I enter from Canada to US?

[arai]

I have Indian Passport stamped with US B1/B2 Visa from India from my previous employer. I am now in Canada and have Canadian PR card. My current US employer wants me to come over for short Business visit. What all document would I be required in order to visit US?

[peace999]

Once you have a multiple entry B1/B2, it is NOT employer specific unless annotated .
ANd it does not matter if you use it to enter from canada.

You won't be asked for any papers at entry but just carry a letter from your employer
stating your purpose of visit and duration of stay.

Caution; Your stated period of stay should not be too long for a business visit.
( few days or 1-2 weeks). Also that you say as your purpose of visit should be
within the scope of B1 status.