回复：回复：回复：急问: 关于NIW/EB1 petition 及 H1b extension

What will happen if you change jobs during the Labor Certification process?

Changing jobs will not affect your Labor Certification process provided your previous employer agrees to continue the Labor Certification petition on your behalf. Since the employment based green card process is future job based.

(from http://www.path2usa.com/immigration/greencard/laborprocess.htm)