Daniel Miessler is a recognized cybersecurity expert and writer with 20 years in Information Security. His experience ranges from technical assessment and implementation, to executive level advisory services consulting, to building and running industry-leading security programs.

His 20 years of experience in security ranges from the vibrant startup ecosystem in his birthplace of Silicon Valley, to working with many of the top 100 worldwide companies. He frequently gives talks and participates in panels around the world, and his work and commentary have been featured in dozens of the world’s leading publications.




Relevant presence data

Daniel dislikes speaking about himself in the third person.

jan 2020 traffic

Web Traffic for January 2020

  • Twitter: @danielmiessler, ~101K followers, verified by Twitter in 2016.
  • Website:, active since 1999, over 2,000 pieces, monthly visitors ~450K, one of the highest rated personal sites in the world—with a Global Alexa rank around 90,000, and a US Alexa rank around 30,000.

  • Podcast: The Unsupervised Learning podcast has been going since 2015, and has been rated as one of the top security podcasts for the last several years. The podcast is downloaded approximately 25,000 times a month according to Omnystudio.

The podcast and newsletter are two parts of the same show.

  • Newsletter: The Unsupervised Learning newsletter has been running since 2015, and is widely popular within the security and tech industry. It reaches approximately 30,000 subscribers and has open and clickrates far above the industry average (~30%/~11% for standard subscribers, and ~75%/50% for members), as measured by MailChimp.
  • Speaking: 2018 Keynote Speaker at the Rocky Mountain Information Security Conference (RMISC), 2016-2018 AppSec California OWASP Conference, DEFCON 23 (IoT Village), BlackHat 2015 (Arsenal), OWASP AppSec USA, RSA USA (2015, 2016, and 2017), many, many more

Also listed on a list of people who gag when talking about themselves being on lists.


  1. I strongly dislike speaking of myself and my work in this way, and I used to have this page hidden away just for responding to media inquiries. But with the recent changes to Google’s algorithms (circa September 2018) that focus on fighting fake news and establishing credibility, it’s now become necessary to demonstrate clearly who you are and why someone should listen to you with everything you write. So my apologies for this reading like a case study in narcissism.

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