300 Main St.
Suite 4-102
East Rochester, NY 14445, United States
Contact: John Clingerman
Other U.S. Locations
  • California
  • Florida
  • Michigan
  • Nebraska
  • New York
Number of Attorneys
2-10 Attorneys

Practice/Organization Description

John has been with D4 since September 2007 and is currently a Vice President and member of the company’s executive team. His responsibilities are varied and include; project management of computer forensic and data collection projects, overseeing all laboratory operations and personnel and equipment, and personally assisting on many projects. John has conducted several digital evidence collections and computer forensic examinations and provides peer review to other examiners. He comes to D4 after retiring from law enforcement with over 24 years of service, the last 14 years holding the rank of Police Investigator. During his career, he held several positions including Patrolman, Youth Officer/D.A.R.E. Instructor, Evidence Technician, Firearms Instructor, and Narcotics Task Force Supervisor. He has investigated all types of major felony crimes including murder, rape, robbery, burglary and also many types of computer related criminal activities. He has testified hundreds of times in all levels of criminal court from local to federal. In November 2006, he was featured in the National White Collar Crime Center’s quarterly issued magazine for uncovering a major international identity theft ring. He has earned many citations during his career including Officer of the Year and two Life Saving Awards.

John’s computer forensic trainings have been with the National White Collar Crime Center, International Association of Computer Investigative Specialists (IACIS), Guidance Software and Access Data Corporation. He is a Certified Forensic Computer Examiner (CFCE) and a Certified Electronic Evidence Collection Specialist (CEECS). He has taught computer forensics at a local community college as well as coached others with the CFCE process. He is also a licensed Private Investigator in New York State.

About D4, LLC

D4, LLC is national leader in litigation support and e-Discovery services to law firms and corporate law departments. D4 covers the spectrum of the Electronic Discovery Reference Model (EDRM), from identification and preservation of data through forensic and targeted onsite data collection; from data analytics and defensible search methodology through hosted review and production. D4 assists attorneys in litigation response planning, strategies for negotiation of scope and meet-and-confer, computer forensics, expert testimony and cost reduction practices in litigation support projects. For its rock-solid and highly-scalable performance in hosted review and its outstanding service to clients, D4 was named by kCura as "Relativity Best in Service" in 2010 and 2011.

Founded in 1997 and through its combination and rebranding with Doculegal, D4 has grown to a national presence. With nearly 100 staff, D4 offers full-service locations in Rochester, Buffalo, Tampa, Lincoln, Omaha, New York City, Grand Rapids, San Francisco, San Jose and San Diego. D4 fields consultants and project managers from New York, Colorado, Rhode Island, Michigan, and Washington DC. State-of-the-art data center operations in Rochester are complemented by electronic discovery and litigation support paper document services throughout the United States. In 2010, D4 was recognized in the “Top Five” of the “Rochester Top 100”, honoring the fastest growing companies in Western New York. For more information about D4 and eNtrust™, contact D4LLC at marketing@d4discovery.com or visit www.d4discoverycom

Professional Associations & Memberships

International Association of Computer Investigative Specialists (IACIS)

High Technology Crime Investigative Association (HTCIA)

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