A false post can spread across the internet in hours and follow someone for years. This list recognizes the best internet defamation expert witnesses in practice that attorneys can turn to when they need to explain that damage in court, drawing on deep expertise in digital forensics, online reputation, and the mechanics of harmful content spread.
New York, NY (PRUnderground) July 1st, 2026
Legal Experts AI, a marketplace that connects attorneys and clients with vetted legal professionals, released its selection of the top online defamation expert witnesses in practice. The list recognizes experts whose knowledge of online content propagation, platform architecture, search visibility, and the measurable harm caused by false statements has informed verdicts in defamation, libel, tortious interference, and online harassment cases.
Internet defamation cases require a witness who can do more than identify harmful posts. Attorneys need someone who can trace how false content spreads, quantify the reputational and economic damage it causes, and explain to a jury why a prominent search result, social media post, or online thread can create lasting harm. Legal Experts AI evaluated each internet defamation expert witness on this list based on real-world experience, testifying history, familiarity with platform-specific evidence, and the ability to translate the technical realities of the internet into clear, persuasive testimony that can withstand rigorous cross-examination.
The Top 8 Internet Defamation Expert Witnesses
- Sameer Somal — Blue Ocean Global Technology
Sameer Somal advises attorneys on online reputation harm, digital content removal, and the measurable impact of false statements across search and social media platforms. He has consulted on and testified in hundreds of cases, including some for highly esteemed clients such as Kevin O’Leary and Judge Judy.
As CEO of Blue Ocean Global Technology, he has also helped thousands of individuals, executives, professionals, and organizations address harmful, negative, and defamatory online content. With attorney William Choslovsky, Sameer developed the Three-Ring Defamation Framework, which forms a vital part of the Reputation Damage and Repair Framework, which he co-developed with Dr. Alexandra LaJoux and Casey Boggs. For more on his background and availability, visit Sameer’s profile on Legal Experts AI.
Specialty: Online Reputation Management, Digital Defamation, Search Visibility
Location: Doylestown, PA
- Alice E. Markwick—Director of Research, Data and Society
Alice E. Marwick is a qualitative social scientist who researches the social, political, and cultural implications of popular social media technologies. Her most recent book, The Private is Political: Networked Privacy on Social Media (Yale 2023), examines how the networked nature of online privacy disproportionately impacts members of marginalized communities. In 2017, Alice co-authored Media Manipulation and Disinformation Online, a flagship Data & Society report, as well as Status Update: Celebrity, Publicity and Branding in the Social Media Age (Yale 2013), an ethnographic study of the San Francisco tech scene, and was co-editor of The Sage Handbook of Social Media (Sage 2017).
Specialty: Sociology of Online Reputation
Location: New York, NY
- Dr. Davide Proserpio – University of Southern California
Davide Proserpio is the McAlister Associate Professor in Business Administration at the University of Southern California Marshall School of Business. Professor Proserpio’s research centers on measuring and quantifying the effects of digital data and platforms on industries and markets. His work primarily involves empirical analysis across various companies, such as Airbnb, Amazon, TripAdvisor, and Expedia.
Specialty: Digital Advertising, Digital Platforms, Reputation
Location: San Diego, CA
- Joseph Grekoski — Acclimation Group
Joseph Grekoski is the founder of Acclimation Group, based in Fort Lauderdale, Florida, a leading economic consulting firm specializing in expert witness services and economic damages analysis across the United States. Joseph and his firm provide comprehensive support for intellectual property (IP) disputes, offering precise economic damages calculations and valuation services for trademarks, patents, copyrights, and defamation.
Specialty: Defamation, Copyright Infringement, Rights of Publicity
Location: Fort Lauderdale, FL
- Casey Boggs — ReputationUs
Casey Boggs is a global communications leader specializing in reputation management, internal communications, corporate crisis mitigation, A.I. crisis and cyber incident response, media relations, social media influencers, lawsuit communication support, and fundamental public relations services. Founder of two firms, ReputationUs and LT Public Relations, and communications lead for three worldwide organizations: AIG, Waggner Edstrom, and Weber Shandwick.
Specialty: Reputation Management, Cyber Incident Response, Risk Management
Location: Louisville, KY
- Eric Rose — EKA
With more than four decades of experience, Eric Rose is a nationally and internationally recognized crisis management and reputation repair expert, trusted by Fortune 500 companies, trade unions, and public-sector clients to navigate high-stakes media and communications challenges. He’s a go-to expert source for major outlets like the LA Times and AP, and also serves as an expert witness in defamation and image repair litigation.
Specialty: Reputation Management, Internet Defamation, Media Relations
Location: Los Angeles, CA
- Deanna Foster — Psychological Resources & Services, Inc.
Deanna Foster is a psychological expert specializing in emotional distress arising from workplace trauma, catastrophic events, and litigation-related psychological injury. She’s dually licensed in California and Colorado, holds a Certified Clinical Trauma Professional designation, and has been retained in roughly 80 civil litigation cases for both plaintiffs and defense.
Specialty: Emotional Distress, Workplace/Employment Litigation, IME & Malingering Evaluation
Location: Denver, CO
- Robert J. Fisher — Fisher & Associates, Inc.
Robert J. Fisher is a nationally recognized crisis communications and reputation repair expert. He’s testified in over 100 cases across 31 states and D.C., with high-profile matters touching Fox News/Dominion, Duke University, and the Central Park Five case, and has been sought as a media analyst during events like the O.J. Simpson trials.
Specialty: Defamation & Reputation Harm, Internet Defamation & Negative Reviews, Crisis Communications
Location: Westlake Village, CA
Attorneys and clients with active defamation and online reputational harm matters can find internet defamation expert witnesses to strengthen their legal strategy through Legal Experts AI.
How This List Was Compiled
Each internet defamation expert witness on this list was reviewed for specialized knowledge, relevant credentials, and years of active testimony e spanning online reputation management, digital forensics, social media analysis, search engine behavior, and the quantification of reputational harm. The selection draws on publicly available research, case records, professional background, and the range of defamation and online harassment matters each expert has addressed.
About Legal Experts AI
Legal Experts AI is a legal marketplace and modern directory connecting clients with lawyers, law firms, paralegals, and expert witnesses through AI-powered matching and verified professional profiles. Based in Springfield, Illinois, the company modernizes how legal services are accessed by replacing referral-dependent processes with transparent, data-driven connections and rankings.
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