Benno is a rather generalist but highly experienced software engineer who’s worked at pretty much every level of the stack, and yes, that means you can ask him about kernel code. He has written code, run projects, managed teams, created and delivered presentations, and had many, many opinions.
If you’re interested in his work history, you can check out his resume or you can find him on LinkedIn. If you’d like to see him speak, he has a list of talks. If you want to get in touch you can email him or if you want a random assortment of rubbish stream of consciousness you can find him on Twitter.