Child Safety - Former Global intel & Public Policy

Specialties & Experience of this Expert Witness

Additional Information

Siobhan MacDermott is the founder of TeenAegis, a digital harm intelligence organization that provides expert witness services, litigation support, and platform danger analysis in social media harm cases. She developed the Threat Assessment Intelligence Methodology (TAIM), a proprietary platform danger scoring system that produces Daubert-ready expert analysis of how social media platforms engineer harm in minors. The TAIM Platform Danger Index currently scores eight major platforms — including Instagram, Snapchat, TikTok, Discord, Roblox, YouTube, Facebook, and X/Twitter — using a structured methodology grounded in behavioral science, platform architecture analysis, and documented internal research from discovery in MDL 3047 and related state court actions. MacDermott brings three decades of experience in global risk, cybersecurity, and threat intelligence, with a career spanning corporate intelligence, geopolitical risk analysis, and digital security across North America, Europe, and Asia. She has provided briefings to members of the United States Congress and has advised government and private sector clients on complex threat environments at the intersection of technology, policy, and human behavior. She was previously Vice Chairman at a large global bank. Her academic credentials include a Master of Arts in Law and Diplomacy from The Fletcher School at Tufts University — one of the world's leading graduate schools for international affairs and security — and an MBA from Thunderbird School of Global Management, with a focus on international business and risk. She holds additional training in threat assessment, behavioral analysis, and digital forensics methodology. MacDermott has designed and delivered law enforcement training curricula on platform-facilitated child exploitation, including a 16-hour foundational curriculum for police academies and an 8-hour POST-eligible continuing education program for active law enforcement. She is a regular speaker on platform harm, digital risk, and child safety at legal, security, and policy conferences. She has presented on cybersecurity and risk at the World Economic Forum, Milken and RSA. TeenAegis maintains strict financial independence from the social media industry. The organization does not accept platform revenue, advertising revenue, or funding from any entity with financial ties to social media companies. This independence is structural and is a core element of MacDermott's expert witness credibility — her opinions are not subject to challenge on the basis of industry funding relationships. MacDermott is available for retention as an expert witness in cases involving social media harm, platform product liability, algorithmic harm causation, COPPA violations, child exploitation facilitated by platform design, and related matters. She provides written reports, deposition testimony, and trial testimony. Engagements are accepted in both plaintiff and non-platform defense matters. Education Master of Arts, Law and Diplomacy — The Fletcher School, Tufts University MBA — Thunderbird School of Global Management Areas of Expertise Social media harm and platform danger assessment · Expert witness, technology and product liability · Threat Assessment Intelligence Methodology (TAIM) · Daubert-ready opinion methodology · Adolescent online safety and digital risk · Platform architecture and algorithmic harm analysis · MDL 3047 and social media addiction litigation · Cybersecurity and digital intelligence · Global risk and geopolitical threat analysis · Child exploitation and CSAM platform vectors · Legislative and regulatory policy, child safety · Corporate digital liability and insurance risk