BAE Systems has two opening, one for a kernel engineer, another for a cross-domain guard application that takes advantage of the security features of our OS. The OS was built entirely in house with security as its primary goal. It's not Linux, not BSD, and not derived from any other OS. We've got a long history of developing secure systems going back to the Multix days. So if you've got an interest in security and kernel/OS development, or developing secure filtering applications, I can't recommend this job enough.
Feel free to contact me directly, or check out the official job reqs, which can be found here:
Kernel: https://jobs.baesystems.com/global/en/j ... l-Engineer
Guard/Apps: https://jobs.baesystems.com/global/en/j ... n-Engineer