Cudjoe Key, FL Immigration Law Firms & Lawyers

You may or may not be able to apply for residency or work on the basis of your deceased father and paternal grandfather who were permanent resident and citizen respectively. There is no mechanism for a deceased permanent resident father to benefit a child unless the father petitioned for the child prior to passing away. If he had, there are a set of narrow rules under which a child may or may not qualify for benefits. But with respect to your maternal grandfather, he could not transmit U.S. citizenship or any other benefit to you unless he first transmitted such citizenship to your father and your father satisfied a period of physical residence in the States prior to your birth. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.

No. Once you have a 10 year green card, it's good for life unless you lose it by being convicted of certain crimes or if you remain outside the US for longer than a year without advance permission. 

Your question requires an attorney consultation. It is not a simple question that can be answered on this type of forum. There are many factors that would need to be considered and evaluated. I strongly suggest that you contact an experienced immigration attorney for a face-to-face consultation and give him/her all of the facts surrounding your situation. He/she would then be in a better position to analyze your case and advise you of your options.