Sebastián Castro (@r4wd3r) is an information security specialist with experience as a network & application pentester, red teamer, and vulnerability researcher since 2013. Born in Bogotá, Colombia, he has contributed to the evolution of well-known community projects, and discovered critical security issues in corporative software and Operating Systems. In 2020, he co-authored a book released in many countries about red teaming with the publisher 0xword. Sebastian is currently a Ph.D. student at the University of California and is one of the proud captains of its CTF team. He has also taught courses to universities and private organizations about malware analysis, exploit development and vulnerability research. As an international speaker, he has presented his own research at international conferences, such as Black Hat Arsenal, Derbycon, BSides, SEC-T, and Romhack.