Good employer who can apply green card

USA H1B Visa
1

Hi

My H1b visa going to expire in June 2018. Totally, I am in USA for the past 9 months.

My questions are

  1. Still I can be in USA for another 63 months if I have a project from the employer

  2. Do I need togo for another stamping interview in India

  3. in another 6 months my visa will expire, can I look for another employer who can file green card for me

4)Suggest some good employer who can sponsor green card

Thanks in advance