When an investigation's process or findings come under challenge (at a disciplinary hearing, mediation, or in front of the Employment Relations Authority), an independent expert witness can give the matter credibility that an internal account alone can't. Here's what the process typically looks like.
1. Initial briefing
The engagement starts with a confidential conversation about the matter: what's being disputed, what stage the proceedings are at, and what kind of expert evidence is actually needed. This determines the shape of everything that follows.
2. Reviewing the file
The expert witness reviews the relevant material: the original investigation, interview notes, terms of reference, and any documentation already in dispute. The goal is an independent view of whether the process and findings meet accepted investigative standards, not a rubber stamp of anyone's preferred outcome.
3. Preparing a written report
Findings are set out in a clear, plain-English report, avoiding jargon that would leave a hearing more confused than informed. The report addresses the specific questions the engagement was scoped around, with reasoning that can be followed and tested.
An expert witness isn't there to advocate for a side, only for what the evidence and process actually show.
4. Giving evidence
If the matter proceeds to a hearing, the expert witness is available to present findings and answer questions under cross-examination. This is where independence matters most: a report that can't be defended under scrutiny isn't worth much.
5. Ongoing availability
Legal and employment matters don't always move in a straight line. Availability is kept flexible enough to accommodate adjournments, additional questions, or a change in scope as the matter develops.
If you're weighing up whether a matter needs expert witness input, an initial conversation costs nothing and is treated in complete confidence.