Regarding your question around becoming a Legal Permanent Resident (LPR, that is, a green card holder): The L1B non-managerial category usually processes slower than L1A (senior managers and executives). This is most often because L1B holders fall under the EB2 (employer-based, 2nd priority) permanent residency category. If your employer's immigration lawyer has the experience to do so and sees that you meet the definition, see if you can get classified as a "functional manager" (meaning that you are primarily responsible for a critical part of the business), which would put you in the L1A visa category and give you a much easier path to EB1 LPR status. Note that L1 visas, whether A or B, have a general cap of 5 or 7 years before the holder must leave the United States.
Your employer applies for LPR on your behalf. When using employment- or investment-based visas, you will quickly find that all paperwork has to be done by your employer or corporation and you're just along for the ride.
Your employer applies for LPR on your behalf. When using employment- or investment-based visas, you will quickly find that all paperwork has to be done by your employer or corporation and you're just along for the ride.