An expert witness’s paramount duty is to the court — not to the party who retains them. That independence is exactly what makes expert evidence valuable: evidence that holds up under cross-examination because it is impartial, methodologically sound, and defensible.
NSI Global provides credible, independent expert witness services to law firms and legal representatives across Australia. Our role is not to advocate for a position, but to give the court clear, factual evidence in digital forensics, e-discovery and information security matters — evidence that withstands scrutiny precisely because it is objective.
Our Expert Witness
NSI Global’s expert witness work is led by Navid Sobbi, who holds a Bachelor of Laws and postgraduate qualifications in Intelligence, Digital Forensics and Counterterrorism and has provided expert evidence in Criminal, Civil, and Family law proceedings. Navid’s fields of accepted expertise include mobile device forensics, computer forensics, e-discovery, cellular tower and location analysis, advanced digital forensics, counterintelligence, international security and transnational crime.
His evidence has been accepted in matters including Peek v Wheatley [2025] NSWSC 554 and Wheatley v Peek [2025] NSWCA 265.
Navid has prepared expert reports and given evidence before Australian District and Supreme Courts, the Federal Circuit and Family Court of Australia, the NSW Court of Appeal and the NSW Court of Criminal Appeal, principally on instructions from law firms, law enforcement agencies, state Offices of the Director of Public Prosecutions and the Office of the Commonwealth Director of Public Prosecutions. A full case list can be found here.
When to Engage an Expert Witness
- A matter turns on the interpretation of digital or forensic evidence
- The opposing party has served an expert report that needs independent review
- The court requires a technical question resolved by a qualified, impartial expert
- Evidence must be presented in a form that will withstand cross-examination
An expert’s duty to the court means some things cannot be promised. We do not adjust findings to suit a client’s case, and where the evidence does not support the proposition we have been asked to consider, our report says so. Where a question falls outside our fields of expertise, we say that too.