Had the exact same predicament. Struggled with it morally, until I was exclusively working on offensive technologies ("cleanly isolating and neutralizing target

Had the exact same predicament. Struggled with it morally, until I was exclusively working on offensive technologies ("cleanly isolating and neutralizing targets via unmanned air vehicles, out of line of sight with no gps"). That's when I quit and got some of my morality back by joining a quant firm that makes money off of other people purely for the purpose of making money and nothing else. No wonder I have such an alcohol problem...