Ehijele E. Olumese is an associate in the Century City office of Wilson Sonsini Goodrich & Rosati. Ehijele advises companies on cybersecurity incident response, crisis management, regulatory investigations, and data protection compliance. Having spent nearly a decade as a cybersecurity engineer before entering legal practice, Ehijele brings a technical foundation that allows him to help clients ranging from start-ups to Fortune 500 companies across industries including digital media and entertainment, technology, financial services, life sciences, consumer products, ecommerce, software, artificial intelligence, and government contracting prepare for, respond to, and recover from security incidents, while helping them build and defend the programs that reduce the likelihood of the next one.

Ehijele has directed incident response engagements involving ransomware, business email compromise, vendor and supply chain compromise, and insider threat, guiding clients from initial investigation through containment, forensic analysis, notification, and remediation. While seconded to a global technology platform, he led the investigation and resolution of global privacy and security incidents affecting employee and consumer data, applying domestic and foreign breach notification requirements, making legal determinations under significant time pressure, and briefing senior management on critical events. He works alongside forensic firms, threat intelligence providers, and crisis communications advisors; counsels boards and executive teams through the operational and reputational consequences of a security event; and helps clients prepare in advance through incident response planning, escalation frameworks, and tabletop exercises.

Beyond incident response, Ehijele counsels clients on cybersecurity program development, security and risk assessments, vulnerability management, and third-party risk, and has partnered with leading security firms to conduct privileged cybersecurity and privacy program audits assessed against industry frameworks, including the NIST Cybersecurity Framework, presenting findings to executive management and boards of directors. His regulatory compliance practice spans the CCPA cybersecurity audit requirements, SEC cybersecurity disclosure rules, the New York Department of Financial Services Cybersecurity Regulation, and government contracting requirements, including DFARS Clause 252.204-7012, NIST SP 800-171, and CMMC. He represents clients in regulatory inquiries and investigations arising from security incidents before state attorneys general and federal regulators, and advises on the security and privacy implications of artificial intelligence deployments, including the assessment of AI vendors and AI-enabled products. He also provides cybersecurity and privacy counsel across corporate and commercial transactions, including diligence and the negotiation of data protection, security, and incident notification terms.

Prior to entering legal practice, Ehijele was a lead cybersecurity engineer at The MITRE Corporation, where he focused on cybersecurity strategy, policy, and privacy in the national security context. He led a team of engineers conducting advanced vulnerability and risk assessments on United States weapons systems and advised the Department of Defense Deputy Chief Information Officer on privacy and security matters. He is a credited contributor on NIST Special Publication 800-53, Revision 5, and NIST Special Publication 800-53B, which together establish the federal catalog of security and privacy controls and corresponding baselines. Ehijele holds the CISSP, CCSP, and CEH credentials and is recognized as a Fellow of Information Privacy by the International Association of Privacy Professionals.