Mark brings carefully selected criminal and civil cases to the stage, illustrating how errors by expert witnesses or their instructing lawyers can escalate into significant difficulties in court. These cases show how preventable weaknesses affect outcomes, delay proceedings, and undermine confidence in the process.
His stories bring audiences together around a shared understanding of how expert evidence should function, regardless of their professional background. Attendees leave with a clearer appreciation of how careful preparation supports the system of justice and reduces avoidable dispute.
How Mark’s Keynotes Hold an Audience
Opening Focus
Mark begins with a real case that illustrates what can go wrong when expert evidence is unclear. Within minutes, the audience recognises the practical consequences of weak preparation.
Professionals from different backgrounds connect through shared experiences of expert evidence. These discussions often continue throughout the event, creating a sense of common purpose around clarity, preparation, and communication.
Organisers consistently report that Mark’s keynote sets the tone for their programme, encouraging thoughtful engagement and sustained interest.
Unify Your Audience
Encourage a common understanding of expert evidence and preparation.
Professional Dialogue
Real cases prompt meaningful discussion across disciplines.
Create Community
Clear expert communication becomes a unifying theme for the event.
“Expert witnesses are often out of their depth, but it doesn’t get discovered until it’s too late to undo the damage. Early preparation can avoid significant pain at a court hearing."
– Mark Tottenham
About Mark
Mark Tottenham is an author, speaker, and co-host of Ireland's top legal podcast The Fifth Court. He draws on 20+ years of practice as a barrister, and analysis of hundreds of cases where unclear or poorly presented expert evidence created significant difficulty for the court, affected the fairness of proceedings, or placed the expert’s own credibility at risk.
As a keynote speaker, Mark presents cases that show where expert evidence succeeds and where it falters, and the consequences for the pursuit of justice. His presentations create a shared professional interest in improving clarity, independence, and communication in expert testimony. Mark has presented to organisations including the Asia Pacific Institute of Experts, the EU Counterfeit Experts’ Group at the European Central Bank, King’s Inns, and the Law Society of Ireland.
Mark’s groundbreaking books The Reliable Expert Witness and The Guide to Expert Witness Evidence have become the authoritative resources for expert witnesses and attorneys, respectively, on expert testimony.
Mark has been a featured speaker for:
