General Dynamics Ordnance and Tactical Systems has several open job positions across the U.S.A. Examples:
https://www.glassdoor.com/Jobs/General-Dynamics-Ordnance-and-Tactical-Systems-Jobs-E34496.htm?filter.countryId=1
Lockheed Martin more than 3k jobs
https://www.glassdoor.com/Jobs/Lockheed-Martin-Jobs-E404.htm?filter.countryId=1