Kevin Mandia, the CEO of FireEye, at a company office in Reston, Va. Last December, the cybersecurity firm uncovered the hack of SolarWinds, which hit 18,000 organizations, including nine U.S. government agencies.

The CEO of FireEye Kevin Mandia gives a tour of the cybersecurity company’s unused office space in Reston, Va., Tuesday, March 9, 2021. Mandia said 550 of his employees are working remotely and responding to a recent barrage of cyber breaches, including four different zero-day attacks against Microsoft Exchange. (AP Photo/Nathan Ellgren)