Can I applied for a work permit in usa while on a waiver

I doubt that you can apply for a work permit if entering the US by waiver for six months. I assume that the entry was not for working purposes, and it would likely take USCIS six months plus at its current pace to process an employment authorization application even if you were eligible. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (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.