Generally speaking, and based on past experience, while someone on L1 B status can switch to L1 A., if qualifies. the chances of that the person obtaining a green card through EB-1(c) category are next to nil. A much better route would be to attempt to obtain a green card after having been first admitted into H1B status and have the employer file a PERM application for labor certification as soon as possible. Your place of birth, however, will come back and bite you when it comes to "priority date" for updating the green card, Fort there what will determine will be your country of birth, and not country of current nationality.
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No. Nothing can be converted to anything. It is not a currency world. Your employer can file for a change of status from L1B to L1A for you. For that, they should hire an immigration attorney and not rely on HR people who have no business practicing law, nor have the capability to do so.
The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter,not should it be viewed as establishing an attorney client relationship of any kind.
Switching to L-1A is definitely possible. EB1c maybe, you really should just consult with an attorney in San Francisco that does this all the time. Jackson & Hertogs, talk to Dan or Ilana, they could assess your case quickly and accurately.
Due to the nature of this forum, Attorney Maria J. Marty does not have all the information required to provide legal advice. Accordingly, her responses on Avvo are intended as general and not legal advice.