@mvc I googled it and didn't find what you said. Below are the links which tells you everything but it might not be authentic as these are forum. Can you put your google finding? http://www.trackitt.com/uk-discussion-forums/i485-eb/992694193/working-for-multiple-clients-through-sponsoring-h1b-employer http://www.immihelp.com/forum/showthread.php/52383-Working-Multiple-Jobs-on-a-Single-H1B http://www.immigration-information.com/forums/forum/nonimmigrant-issues/general-nonimmigrant-visa-issues/14116-multiple-jobs-on-single-h-1b?page=1&s=1af0834f543e2dc240e80224cc8d49d4 Also, I don't know what my employer did...but I worked with two diff clients through my employer...it was in 2007. Also, make sure, end clients and employer are two diff things.