Emergency Response Security Group is a boutique cybersecurity consultancy headquartered in Oregon, providing strategic security consulting, incident response, digital forensics, and investigative services to organizations throughout the United States. Remote engagements are standard, with on-site consulting available when project requirements warrant travel. Founded by Rhiannon Williams, Emergency Response Security Group brings more than 27 years of enterprise cybersecurity experience spanning telecommunications, government, defense, financial services, gaming, retail, and critical infrastructure. The firm specializes in helping organizations identify, investigate, and remediate complex security challenges through practical engineering, investigative rigor, and executive-level advisory services.

Rhiannon Williams brings more than 27 years of enterprise cybersecurity experience spanning advanced digital forensics, incident response, offensive security, security research, penetration testing, and complex investigations, including recognized cyber defense work with the Department of War. Outside of work, Rhiannon volunteers with victims of crime, enjoys restoring old sewing machines, and is happily married (sorry, fellas). Clients hire her for her intellect, experience, investigative instincts, and ability to solve exceptionally difficult problems. Her professional work focuses on corporate espionage, sophisticated intrusion and data-leak investigations, anti-forensics research, security architecture, threat modeling, security assessments, and attack simulation. She combines deep technical expertise with decades of real-world security operations, independent security research, victim-focused nonprofit cyber work, and guest authorship on cyber warfare.

Rhiannon is an award-winning cybersecurity engineer with deep technical expertise in penetration testing, red team and blue team operations, and advanced threat simulation in complex, custom-built environments. She has extensive experience in hands-on security research, advanced threat detection, and proactive defense strategies designed to safeguard critical infrastructure and intellectual property. Her technical background also includes malware reverse engineering, exploit development, and the design of robust security architectures to mitigate corporate espionage and advanced cyber threats. Core capabilities include incident response, digital forensics, penetration testing, red team operations, email security, malware analysis, phishing investigations, identity and access governance, SIEM and EDR engineering, open-source intelligence (OSINT), threat hunting, corporate investigations, and security architecture. Every engagement is conducted with strict confidentiality, technical precision, and a focus on measurable business outcomes. Our consulting philosophy is rooted in clarity and execution. We work alongside executive leadership, legal teams, and law enforcement, technical teams to understand organizational risk, prioritize remediation efforts, and implement security strategies that strengthen resilience while supporting operational objectives. Emergency Response Security Group is a licensed and insured business in the State of Oregon.

Business partners and referrals are always welcome.

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Proud sponsor of the 2025 KofC Golf Tournament

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Under Construction

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