Krassimir Tzvetanov is a graduate student at Purdue University focusing on Threat Intelligence, Operational Security, and Counterintelligence techniques (in the cyber domain). In the recent past, Krassimir was a security engineer at a small CDN, where he focused on incident response, investigations, and threat research. Previously he worked for companies like Cisco and A10 focusing on threat research and information exchange, DDoS mitigation, and product security. Before that, Krassimir held several operational (SRE) and security positions at companies like Google and Yahoo! Krassimir is very active in the security research and investigation community and has contributed to FIRST SIGs. He is also a co-founder and ran the BayThreat security conference and has volunteered in different roles at DEF CON, ShmooCon, and DC650.