[chris_wot]

Sounds like an awesome job with good engineers but neglectful and irresponsible management.

If you are only making these warnings verbally, you might want to consider emailing your immediate manager with a list of concerns. Make it as neutral as possible and ask for guidance on how they want to address the issues. But if it's on the mail server, it will be good for discovery if the worst happens, and frankly given lives are at stake you probably need to show, in writing, that you were attempting to have the issues addressed.

Who knows? That might actually get traction. Might even save someone's life!