A B1 visa won't make you eligible for employment in the US, either, so you'll need a green card to apply for a job or be sponsored for an H1. A crew visa won't make you eligible.
B-1 Business Visitor Ineligible activies
The following activities require a working visa, and may not be carried out by business visitors:
Running a business.
"Gainful employment".
Payment by an organization within the US.
Participating as a professional in entertainment or sporting events.