Areas of Expertise: Audio & Video Forensics; Cell Phone & Mobile; Digital Evidence & e-Discovery; Digital Forensics; Computer & Digital Forensics; Information Technology; Intellectual Property; IP Infringement; Trade Secret.
Digital Forensics, eDiscovery, Electronic Evidence & Information Governance Expert Witness
David Greetham is an internationally recognized Digital Forensics, Electronic Evidence, eDiscovery and Information Governance Expert Witness with more than 35 years of experience analyzing digital evidence and providing litigation support in complex commercial, criminal, intellectual property, employment, trade secret, bankruptcy, regulatory, and government investigations. He serves as both a consulting and testifying expert for plaintiff and defense counsel. Mr. Greetham is frequently engaged as a neutral expert, providing independent analysis and opinions trusted by all parties in complex digital forensics, Information governance and eDiscovery matters.
Unlike many experts whose backgrounds are limited to forensic examinations, Mr. Greetham combines deep technical expertise with decades of experience leading digital forensic laboratories, managing global eDiscovery operations, developing patented forensic technologies, and explaining highly technical concepts in a clear and persuasive manner for judges, juries, arbitrators, and attorneys.
Professional Experience
Mr. Greetham's experience and qualifications include:
- Principal Consultant, Digital ESI
- Former Vice President of Digital Forensics, Level Legal
- Former Vice President of eDiscovery, Ricoh Americas
- Founder of two successful digital forensic consulting firms
- Completed Master of Science in Forensic Computing from Cranfield University (ranked among the world's top five technical universities, based at the Defense Academy of the United Kingdom)
- Certified Fraud Examiner (CFE)
- Certified eDiscovery Specialist (CEDS)
- Certified Information Governance Officer (CIGO)
- Certified Computer Crime Investigator
- Certified Computer Forensic Technician
- Licensed Private Investigator
- Lifetime Achievement Award Winner (ALM Legal Week 2026)
- Multiple U.S. patents in digital forensics, cloud collections, eDiscovery, and electronic evidence
- Inventor of Remlox™, the world's first patented remote forensic collection platform, used in 39 countries
Representative Expert Witness Matters
Mr. Greetham has provided consulting and testimony involving: Digital Forensics, Computer Forensics, Mobile Device Forensics, Electronic Evidence, eDiscovery, Information Governance, Trade Secret Theft, Intellectual Property, Employee Data Theft, Data Misappropriation, USB Device Analysis, Metadata Analysis, Email Authentication, Email Header Analysis, Deleted Data Recovery, Cloud Data Collections, Microsoft 365 Collections, Internet History Analysis, Volume Shadow Copy Analysis, Windows Artifacts, Registry Analysis, Spoliation, Data Preservation, Litigation Holds, Chain of Custody, Digital Evidence Authentication, Deepfake & Synthetic Media Analysis, Cyber Investigations, and Fraud Investigations.
Mr. Greetham has testified in numerous state courts, federal courts, bankruptcy proceedings, arbitration matters, regulatory investigations, and international proceedings, including the landmark Coleman Holdings v. Morgan Stanley litigation. His testimony has involved trade secret theft, electronic evidence preservation, metadata, forensic collections, cloud computing, information governance, patent matters, financial fraud, employee misconduct, digital evidence authentication, and cybersecurity.
Why Attorneys Retain David Greetham
Attorneys retain Mr. Greetham because he combines decades of technical expertise with substantial courtroom experience. He has worked as an expert witness, forensic investigator, technology executive, entrepreneur, inventor, educator, and trainer for government agencies, law firms, corporations, and educational institutions.
His unique experience includes developing multiple patented forensic technologies, training the Executive Office of the President at the White House, Harvard Law School, and New Scotland Yard, and leading digital forensic investigations involving thousands of custodians across multinational matters.
Mr. Greetham is widely recognized for translating highly technical digital evidence into clear, understandable testimony that assists judges, juries, arbitrators, mediators, and attorneys in resolving complex disputes involving electronically stored information (ESI), digital evidence and information governance.
Litigation Experience Highlights
Mr. Greetham has provided expert testimony and consulting in matters involving trade secret misappropriation, intellectual property, shareholder disputes, securities litigation, bankruptcy, employment litigation, capital murder, government investigations, sanctions proceedings, patent disputes, data spoliation, cloud collections, metadata authentication, email recovery, mobile device forensics, Microsoft Windows artifacts, electronic evidence preservation, and enterprise information governance. His experience includes proceedings before federal and state courts, bankruptcy courts, the American Arbitration Association, the U.S. Patent and Trademark Office, and high-profile multi-district litigation.