.....or he has over ten years so is vested in his federal pension and found a job that pays better with new opportunities, or he got married and his spouse works in Dallas, or he wanted to move to be near his elderly parents, or he has always dreamed of Cowboys season tickets, or who knows? We've all left jobs for all sorts of reasons.
He seemed like a nice guy who wanted to answer questions (even if he was restricted by his agency). Whatever the reason, let's just wish him well in life and success in his new job.
And hope that TSA decides to let someone else answer questions here some day.