Tom Noonan is a serial entrepreneur turned investor who co-founded nearly a dozen companies including Internet Security Systems (sold to IBM for ~$1.8-1.9B), Endgame Security, and JouleX before founding TechOperators and investing his own capital into 75+ early-stage companies. He treats cybersecurity as a control systems problem reflecting his mechanical engineering background, frames networks as automated control systems, and operates more like a player-coach than traditional VC by providing hands-on guidance while investing a substantial amount of his own money (~$250M of personal investment into early-stage ventures).