Nikolaos Kapellos, OSCP, OSEP, OSCE, CRTO, CRTL, ACCA, CISA, is a seasoned professional with extensive experience in IT audit and penetration testing. Currently serving as a Principal at Deloitte since April 2009, Nikolaos has managed red team operations and IT audit teams, focusing on risk-based audits of information systems. Previous roles include Senior Analyst at Accenture, where responsibilities included US Sarbanes Oxley compliance, and freelance PHP Developer. Nikolaos has a strong academic background, holding a Master's degree in Business Systems Analysis and Design from City, University of London, and a Bachelor's degree in Accounting and Finance along with Computer of Information Systems from the American College of Greece.