an urgent question, please help me.

Hi, Guys,

I am on H1b visa now working for one university as a staff member. Right now there is an opportunity to be an online adjunct instructor for another university. I am wondering whether I can take these two jobs simultaneously. I want to depend on my regular job for green card application (not started yet) but want to take the other job as well. Can I do it? Thank you for your reply.