Green card holders (permanent residents) are not eligible to file Form I-130 for a brother or sister.

The process for siblings is part of the family preference category (F4) and has a long waiting time often several years, depending on your sibling’s country.

You can still support your sibling in other ways, like helping with a visitor visa or advising on employment or student visa options.

If you’re close to becoming a citizen, it may be worth waiting and applying after naturalization.