Dave Lewis

Advisory CISO

Cisco Security

Dave Lewis is a Global Advisory CISO at Cisco Security. He has 25 years of experience in IT security operations and management including a decade dealing with critical infrastructure security. He is the founder of the security site Liquidmatrix Security Digest and writes columns for Daily Swig, Forbes and several other publications.


December 15, 2022


Oh, the scammers online are frightful

3 min read

Scammers are always lurking in the void of the Internet waiting for a chance to fleece the unexpecting from their hard-earned money. This can manifest itself to the unsuspecting in many ways.

March 9, 2022


Stay on target: How accurate threat detection leads to better defense

3 min read

How exactly can enhanced visibility increase our chances of guarding against data breaches and cyberattacks? Cisco Advisory CISO Dave Lewis (@gattaca) explains in part 4 of our blog series unpacking our latest #SecurityOutcomes study.

February 16, 2022


Headcount alone isn’t enough for your headaches

4 min read

There's an overwhelming need to ensure enterprises can respond to threats in a timely matter. In part three of our #SecurityOutcomes Study blog series, Cisco Advisory CISO Dave Lewis shares the key elements of effective incident response.

January 6, 2021


Security Outcomes Report: Top Findings from Around the World

3 min read

What practices increase the probability of success in #SecurityOutcomes – and how do they differ in Europe, Asia and the Americas? Read the top findings from around the world.