[4][5] In 2011, Mandiant received funding from Kleiner Perkins Caufield & Byers and One Equity Partners to expand its staff and grow its business-to-business operations, providing incident response and general security consulting along with incident management products to major global organizations, governments, and Fortune 100 companies.

[12][13] In October 2020, the company announced Mandiant Advantage, a subscription-based SaaS platform designed to augment and automate security response teams which combined the threat intelligence gathered by Mandiant and data from cyber incident response engagements;[14] in December, the company investigated a major supply chain attack through SolarWinds software in U.S. government infrastructure.

[15][16][17] In May 2021, Mandiant was contracted to assist in the response to a ransomware incident impacting Colonial Pipeline, a fuel pipeline operator that supplies close to half of the gasoline, diesel, and other fuels to the East Coast of the U.S.[18][19] In June, the company was spun off FireEye as part of the latter's acquisition by Symphony Technology Group.

[2] Following the announcement, Fortune reported that while the deal could face antitrust scrutiny, the acquisition "could help increase competition" rather than harm it.

[29][30] Since 2014, every year around autumn the company organizes a well-known cybersecurity reverse engineering challenge called Flare-On, with participants from around the world.