Author Biographies


Earl Zmijewski, VP of Analytics at Dyn

Earl leads a peerless team of data scientists who are committed to analyzing Dyn’s vast Internet Performance data resources and applying their expertise to continually improve upon Dyn’s products and services.

With over 20 years of experience encompassing scientific computing and most areas of IT, Earl is renowned for his formidable familiarity in the areas of networking and security. Before joining Renesys (which was acquired by Dyn in 2014), Earl spent over 12 years as IT Director at Fluent Inc., a computational fluid dynamics software company, where he was instrumental in establishing new offices throughout the US, Europe and Asia and was the principal architect in the design of Fluent’s networks and Internet security posture. Before that, Earl held various academic positions at Cornell University, University of California, and James Madison University.

Earl holds a PhD and MS in Computer Science from Cornell University and an MS and BA in Mathematical Sciences from The Johns Hopkins University.


Doug Madory, Director of Internet Analysis at Dyn

Doug Madory is the Director of Internet Analysis at Dyn where he works on Internet infrastructure analysis projects. Doug has a special interest in mapping the logical Internet to the physical lines that connect it together, with a focus on submarine cables.

In January 2013, he identified the activation of the ALBA-1 submarine cable serving Cuba, which lead the government of Cuba to confirm that it had suddenly begun using the cable, which had inexplicably lay dormant for two years.

He is regularly quoted by major news outlets such as the Wall Street Journal, New York Times, and the Washington Post about developments on the Internet ranging from national blackouts in Syria and Sudan to the blocking of Twitter in Turkey.

Prior to Dyn, Doug held positions such as chief of computer security for Dartmouth-Hitchcock Medical Center, senior research engineer at BAE Systems, and communications officer in the US Air Force, serving in Baghdad and Balad in the Iraq War.

He holds computer engineering degrees from the University of Virginia and Dartmouth College.

on September 17 | by

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