Paycheck from Company A & work at Company B. What business model am I in ?

I currently work for a company A which provides direct services to different industries.

I am currently supporting Company B and work of off their location. My paycheck comes from Company A. What business model is this (EVC, EV etc).

Is there a possibility of this amounting to an important visa question or an issue for the visa officer.

My appointment is schedule in November 2012.