I’m happy to make comments to media on any breaking security stories, I usually like to talk. Genuine queries about speaking at events will get a response, even if I can’t accept the invite.
I would prefer email if you’re reaching out from the blue about something. I can be contacted by sending an email to firstname.lastname@example.org. (without the __removethis__). This is the easiest way if you want to reach out and I can usually respond pretty promptly.
I don’t see every mention so you may not get a reply via a public tweet.