Geer is currently the chief information security officer for In-Q-Tel, a not-for-profit venture capital firm that invests in technology to support the Central Intelligence Agency.

[1] In 2003, Geer's 24-page report entitled "CyberInsecurity: The Cost of Monopoly" was released by the Computer and Communications Industry Association (CCIA).

The paper argued that Microsoft's dominance of desktop computer operating systems is a threat to national security.

[2] Geer has cited subsequent changes in the Vista operating system (notably a location-randomization feature) as evidence that Microsoft "accepted the paper.

in biostatistics from Harvard, and has worked for:[4] In 2011, Geer received the USENIX Lifetime Achievement Award.