Andrei is the CEO of Bit Sentinel, a cybersecurity company founded in 2015 that offers a comprehensive suite of services, including penetration testing, managed detection and response, and SOC-as-a-Service. He also serves as CTO of CyberEDU, a Bit Sentinel spin-off launched in 2020, which delivers next-generation cybersecurity training through cutting-edge cyber range technology, simulating real-world networks and large-scale cyber attacks using enterprise tools.

He is the founder of DefCamp, established in 2011, one of the leading hacking and information security conferences in South-East Europe, attracting over 2,000 participants from more than 50 countries each year. Since 2020, he has been the co-founder of UNbreakable Romania, a nationwide educational program aimed at high school and university students, with over 6,000 participants from 150+ high schools and 20+ universities to date.

Since 2013, Andrei has also served as President of the Cyber Security Research Center from Romania (CCSIR), a non-governmental organization focused on promoting and coordinating cybersecurity research and initiatives across the region.