請問版上有做過H1B transfer 的人嗎？都什麽程序？我這律師說的靠譜嗎？

Submit an LCA with the Department of Labor which takes 7 days to process.  Once we receive the certification for that we can file your H-1B petition with USCIS.  Once USCIS physically receives the petition you can start working at the new employer, while the new petition is pending.