H1B holders CAN work for multiple employers simultaneously — this is called concurrent H1B employment. Each employer must file a separate H1B petition. Here is how it works: **How concurrent H1B works:** Your primary employer files an H1B petition for their position. Your second employer (concurrent employer) files a separate I-129 petition for their position. USCIS approves both petitions, and you receive two I-797 approval notices — one for each employer. **Concurrent employment vs H1B transfer:** A transfer moves you from one employer to another. Concurrent employment lets you work for both simultaneously. **Requirements for concurrent H1B:** - Second employer must file a full H1B petition (I-129 with LCA) - Second position must qualify as specialty occupation - Both positions must offer prevailing wage - Cap exemption: If you have a valid H1B from your primary employer, the concurrent petition counts against the same cap approval — no new lottery needed **Part-time H1B:** H1B can be filed for part-time positions (as few as 20 hours/week). The LCA must specify part-time and the prevailing wage is prorated accordingly. **Common use case:** An H1B software engineer at a tech company does contract consulting work at a startup. Both file H1B petitions. Both must be specialty occupation roles.