John provides digital forensic and cybersecurity services; he has an extensive background in information technology, asset management, and digital preservation techniques.

John is responsible for implementing and documenting cybersecurity policies and procedures. He regularly conducts security assessments and audits, providing reports and actionable advice for improvement.

John completed the prestigious University of Minnesota Master of Science Security Technologies program, minoring in cybersecurity.

John received his training in digital forensics from the SANS Institute.

John is certified as an ISO 27001 Lead Implementor and Auditor.

As a licensed private investigator, John provides social media monitoring and investigation services, as well as background checks.


CFS prides itself on providing the highest quality and unmatched exceptional service deliverables to its clients.


“Thank you for your contribution to the Eleventh Circuit Judicial Conference…your presentation was a smash hit! Without exception, everyone found it fascinating (and a little frightening at the same time!)…..”

Chief Judge, U.S. District Court Northern District of Florida

“…But they did not realize the magnitude of what they had until they asked…..Computer expert Mark Lanterman discovered that spreadsheets from a critical point in the map-drawing process were missing and that software to wipe the files had been used….”

Washington Post (US Supreme Court case on Wisconsin's Gerrymandering)

“Plaintiffs retained the services of Mark Lanterman, a highly qualified computer forensic expert….Mr. Lanterman’s testimony at the permanent injunction hearing was extremely helpful to the Court and critical to the Court’s findings.”

Court of Common Pleas Cuyahoga County, Ohio