Expert evidence falls outside the typical experience and knowledge of a judge or jury.
Through education, training, certification, skills and experience, an expert witness is an individual who is accepted by the judge as an expert and as such can provide the court with a statement of opinion, therefore helping the court to reach an objective an unbiased decision.

David Harper, Principle Senior Engineering Director at Harper Water Management Group Ltd,is legally registered as an Expert Witness (UK Law Society) and has been called upon in numerous governmental and judicial court hearings on matters related to water hygiene and safety compliance, including Legionella, Pseudomonas aeruginosa and other waterborne pathogen contaminations in healthcare and non-healthcare situations.

David has formed part of investigating teams for Public Health England (PHE) and the Health & Safety Executive (HSE) during a number of high-profile cases. He has also supported clients globally across diverse industries in creating Expert Witness Reports. As an Internationally renowned expert and speaker in water safety and management, David is widely acknowledged as a leading authority on Legionnaires’ Disease and is routinely called upon to advise other teams who are undertaking investigations.