Cyber Security Expert Witness
Craig Petronella is a certified cyber security expert witness and licensed digital forensic examiner who delivers authoritative testimony in federal courts, state courts, and arbitration proceedings nationwide. With 24+ years of hands-on experience in cybersecurity, digital forensics, and incident response, Craig translates complex technical evidence into clear, persuasive narratives that judges and juries understand.
Craig Petronella, Certified Cyber Security Expert
A nationally recognized cyber security expert witness with decades of courtroom experience, forensic lab capabilities, and industry certifications that withstand the most rigorous cross-examination.
Trusted by attorneys, insurance carriers, and corporate counsel to deliver forensic analysis and expert testimony that stands up under Daubert scrutiny.
Craig Petronella founded Petronella Technology Group (PTG) in 2002 and has built the firm into a full-service cybersecurity and digital forensics practice. As a licensed Digital Forensic Examiner (DFE #604180), Craig has conducted hundreds of forensic investigations involving data breaches, ransomware attacks, intellectual property theft, and insider threats. His findings have been admitted as evidence in federal district courts, state superior and district courts, and binding arbitration panels across the country.
Craig holds the CMMC Registered Practitioner (CMMC-RP), CCNA, and CWNE certifications, bringing a rare combination of networking expertise, wireless security knowledge, and compliance experience to every engagement. PTG maintains a dedicated digital forensics laboratory equipped with industry-standard tools for disk imaging, mobile device extraction, network traffic analysis, memory forensics, and cloud evidence preservation.
Beyond technical qualifications, Craig is recognized by the Better Business Bureau with an A+ rating since 2003, reflecting over two decades of integrity, professionalism, and client trust. His team includes additional CMMC-RP certified practitioners, ensuring deep bench strength for complex, multi-faceted litigation support.
Cyber Security Expert Witness for Every Case Type
From ransomware litigation to regulatory enforcement, our cyber security expert witness services cover the full spectrum of technology-related disputes.
Ransomware Litigation
Expert analysis of ransomware attack vectors, encryption methodologies, payment chain forensics, and the reasonableness of an organization's security posture. Craig provides testimony on whether industry-standard defenses were in place, how the attack propagated, and the true scope of data exposure and business interruption damages.
Data Breach Disputes
Forensic investigation and expert testimony for data breach litigation, including root cause analysis, timeline reconstruction, scope of compromised records, notification obligation assessments, and standard-of-care opinions. Craig has investigated breaches affecting healthcare, financial, legal, and government organizations.
Intellectual Property Theft
Digital forensic examination of employee departures, trade secret misappropriation, source code theft, and unauthorized data exfiltration. Analysis includes USB device history, cloud storage activity, email forwarding patterns, and file access timestamps to establish a clear chain of evidence for IP disputes.
Insurance Claims
Independent cyber security expert witness services for insurance carriers evaluating cyber liability claims. Craig provides opinions on policy coverage disputes, the adequacy of pre-incident security controls, causation analysis, and damage quantification for first-party and third-party cyber insurance claims.
Regulatory Investigations
Expert testimony supporting organizations facing regulatory scrutiny from agencies enforcing HIPAA, PCI DSS, CMMC, SOX, and state privacy laws. Craig evaluates whether an organization met its compliance obligations and provides opinions on the reasonableness of security measures relative to regulatory requirements.
Criminal Digital Forensics
Forensic analysis and expert testimony in criminal matters including computer fraud, unauthorized access, identity theft, and cyberstalking cases. Craig works with both prosecution and defense counsel, providing impartial technical analysis of digital evidence, device examinations, and network intrusion reconstructions.
How Our Expert Witness Engagement Works
A structured, defensible process from initial case review through trial testimony, designed to produce evidence and opinions that withstand Daubert challenges.
Case Review
Confidential consultation to understand the technical issues, review existing documentation, and determine whether our expertise aligns with your case requirements.
Evidence Preservation
Forensically sound acquisition and preservation of digital evidence using write-blockers, verified imaging tools, and documented chain-of-custody procedures.
Forensic Analysis
Deep technical investigation using industry-standard methodologies, including timeline analysis, artifact correlation, malware reverse engineering, and network forensics.
Report Preparation
Comprehensive expert reports with clear methodology documentation, findings, supporting evidence, and opinions suitable for Rule 26 disclosures and trial exhibits.
Deposition
Thorough preparation and composed testimony during depositions, with clear articulation of technical opinions and methodology under opposing counsel examination.
Trial Testimony
Authoritative courtroom testimony with visual aids and demonstrative exhibits that make complex cybersecurity concepts accessible to judges and juries.
What Sets Our Expert Witness Services Apart
Technical depth, courtroom experience, and a certified team that delivers defensible opinions every time.
Dedicated Digital Forensics Lab
- Industry-standard forensic imaging and write-blocking hardware for hard drives, SSDs, mobile devices, and cloud accounts
- Network traffic capture and analysis capabilities for intrusion reconstruction and lateral movement mapping
- Memory forensics and malware analysis sandbox for volatile evidence and ransomware strain identification
- Documented chain-of-custody procedures that satisfy federal and state evidence admissibility requirements
Proven Courtroom Experience
- Testimony experience in federal district courts, state superior and district courts, and binding arbitration proceedings
- Methodology designed to satisfy Daubert reliability standards: testable, peer-reviewed, and generally accepted
- Clear communication of complex technical concepts through visual aids, analogies, and demonstrative exhibits
- Entire team holds CMMC-RP certification, providing deep bench strength for multi-expert engagements
Cyber Security Expert Witness Across Industries
Our expert witness and digital forensics services support litigation, compliance, and dispute resolution across a wide range of regulated and high-stakes industries.
Attorneys and corporate counsel across these sectors rely on PTG when they need a cyber security expert witness who can explain technical evidence in terms a non-technical audience can understand. Whether the dispute involves a ransomware attack on a hospital, an insider data theft at a financial institution, or a compliance failure at a defense contractor, Craig Petronella brings the forensic depth and courtroom presence to build a compelling technical narrative.
In insurance litigation, our expert witness testimony helps carriers evaluate whether policyholders maintained reasonable security controls and whether claimed damages are technically justified. For law firms handling client data breach matters, we provide both the forensic investigation and the expert testimony under one engagement, reducing costs and ensuring continuity of evidence handling.
Certifications & Professional Credentials
Verified, current credentials that establish qualification under federal and state expert witness rules.
Licensed Digital Forensic Examiner
DFE License #604180. Certified in forensic acquisition, analysis, and reporting methodologies. Qualified to conduct examinations of computers, mobile devices, network systems, and cloud environments under forensically sound conditions.
CMMC Registered Practitioner
CMMC-RP certification demonstrates expertise in the Cybersecurity Maturity Model Certification framework, critical for defense industrial base disputes, government contractor compliance matters, and NIST 800-171 standard-of-care opinions.
Cisco CCNA & CWNE
Cisco Certified Network Associate and Certified Wireless Network Expert credentials provide deep expertise in network architecture, traffic analysis, and wireless security that is essential for network intrusion and unauthorized access cases.
23+ Years Continuous Practice
Founded PTG in 2002. Over two decades of continuous cybersecurity practice spanning incident response, penetration testing, compliance consulting, and forensic investigation, providing a breadth of real-world experience that strengthens every expert opinion.
Cyber Security Expert Witness FAQ
What is a cyber security expert witness?
A cyber security expert witness is a qualified professional who provides technical opinions and testimony in legal proceedings involving cybersecurity incidents, data breaches, digital evidence, and technology-related disputes. Unlike a fact witness, an expert witness is permitted to offer opinions based on their specialized knowledge, training, and experience. Craig Petronella serves as a cyber security expert witness in both civil and criminal matters, helping courts understand complex technical issues.
What courts does Craig Petronella testify in?
Craig provides expert testimony in federal district courts, state superior and district courts, and binding arbitration proceedings across the country. While headquartered in North Carolina, our cyber security expert witness services are available nationwide for cases in any jurisdiction. Craig has experience with both Daubert and Frye admissibility standards.
Can you serve as both the forensic investigator and the expert witness?
Yes. Craig can conduct the digital forensic investigation and then present the findings as an expert witness. This end-to-end approach ensures continuity of evidence handling, reduces costs by eliminating the need to bring a separate expert up to speed, and provides testimony grounded in firsthand knowledge of the investigation process.
How do you handle Daubert challenges to your methodology?
Our forensic methodology is designed from the ground up to satisfy Daubert reliability requirements. Every procedure is testable, based on peer-reviewed industry standards (NIST, SANS, ISO 27037), and generally accepted within the digital forensics community. We document every step of our process, maintain verifiable chain-of-custody records, and use validated forensic tools with known error rates. This systematic approach has consistently withstood opposing counsel challenges.
What types of expert reports do you provide?
We prepare comprehensive expert reports suitable for Rule 26 disclosures, including detailed methodology documentation, factual findings, supporting evidence references, and clearly stated opinions. Reports can include technical appendices, visual timeline reconstructions, and demonstrative exhibits designed for use at deposition or trial. All reports are written to be understandable by non-technical readers while maintaining the technical rigor needed to survive cross-examination.
How quickly can you respond to an urgent case?
We understand that litigation timelines are often compressed. For urgent matters, we can begin a case review within 24-48 hours of engagement. Our emergency IT support team is available for time-critical evidence preservation situations where delays could result in data loss or spoliation. Contact us at (919) 348-4912 to discuss your timeline.
Do you work with both plaintiffs and defendants?
Yes. As an independent cyber security expert witness, Craig provides impartial, objective technical opinions regardless of which side retains him. Our obligation is to the truth and to the court. We work with plaintiff counsel, defense counsel, insurance carriers, and corporate legal departments. Every engagement begins with a conflict check to ensure independence.
What geographic areas do you serve?
Our cyber security expert witness services are available nationwide. While our digital forensics lab and headquarters are located in the Raleigh-Durham area of North Carolina, we regularly provide expert witness services for cases in other states. Remote forensic analysis, virtual depositions, and travel for in-person testimony are all standard parts of our engagement model. Schedule a consultation to discuss your case requirements.
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Need a Cyber Security Expert Witness?
Contact Craig Petronella for a confidential consultation about your case. Available nationwide for federal, state, and arbitration proceedings.