Emmanuel Guilherme Jr. is a Senior Global IT Auditor at a multinational enterprise, founding member of the OWASP Top 10 for LLM Applications (2023), and lead of the OWASP GenAI Security Project — Data Security Initiative. He is the primary author of the OWASP GenAI Data Security Risks and Mitigations 2026 and creator of the OWASP GenAI Security Crosswalk, mapping GenAI risks to NIST AI RMF, MITRE ATLAS, ISO/IEC 42001, and the EU AI Act. He served as technical reviewer for AI-Native LLM Security (Packt, 2025), holds multiple cybersecurity certifications, contributes to Canada's ISO/IEC AI Mirror Committee, and advises startup founders on building GenAI security programs that stand up to audit.