Mike Wiacek is back with a new company, a year after departing his role as chief security officer at Chronicle, Google’s moonshot cybersecurity company. Wiacek spent 13 years at Google, founding the company’s Threat Analysis Group, a unit dedicated to countering government and state-backed hacking efforts, and also co-founding Chronicle, which was rolled into Google Cloud after a series of high-profile executive departures, including his own. Armed with over a decade of experience, Wiacek is now steering the ship at Stairwell, his new cybersecurity startup.