It depends. YOu need to provide additional details about the particular situation since there are many different scenarios under which one can enter the US with permission to work and not necessarily be in possession of a work visa. And even if there is a work visa, it is usually employer-specific so it can only be used for employment with the petitioning employer.
Please let me know if you have any additional questions or how I can be of further assistance to you in this matter.
Lana
Immigration Attorney