He has consulted US and European governments, more than 80 investment banks, more than 20 venture capital firms; on the investment side, to better understand the technology and landscape of the companies into which they invested, and on the operations side on securing their intellectual property and processes. In 2007 he was appointed VP of Research Operations at 451, where he managed more than 35 technology analysts, developing analysis products and technologies to leverage their insights. Since 2006 Selby has served on the faculty of IANS Research. His work consulting F500 companies on data theft and industrial espionage has placed him at the leading edge of firms helping those under attack by adaptive, persistent adversaries, and he is experienced at managing attacks and architecting recovery networks.

Since 2008 he has focused on law enforcement intelligence, and he works part-time as a sworn police officer in the Dallas-Fort Worth Metroplex, investigating cyber crime. He teaches continuing legal education on cyber crime for prosecutors in one of the country's largest jurisdictions, and writes the TechTalk column for Law Officer Magazine. He is the CEO of StreetCred Software, which produces software that helps law enforcement serve fugitive arrest warrants through predictive intelligence.”   Nick Shelby is a co-author of Blackhatonomics: An Inside Look at the Economics of Cybercrime.

According to the book description of Blackhatonomics: An Inside Look at the Economics of Cybercrime it “explains the basic economic truths of the underworld of hacking, and why people devote hours to develop malware around the world. The root cause analysis of the monetization of cybersecurity in the inner circle of cybercrime is analyzed from the impact of multiple. Written by an exceptional author team, they take practical academic principles back them up with use cases and extensive interviews, placing you right into the mindset of the cyber criminal.”