Engaging with Hydrogeologist Expert, Theresa Jehn-Dellaport

Want a masterclass in expert witnessing from someone who’s seen it all? Hydrogeologist Theresa Jehn-Dellaport joins us to unpack how technical experts can protect credibility, communicate complex science with clarity, and navigate high-pressure moments without losing the thread. From her first landfill siting testimony to water court battles and federal cases, Theresa shows how careful preparation and ethical backbone shape outcomes.

We dive into the first call playbook—what attorneys ask, what experts should ask in return, and the single red flag that ends an engagement: any request to ignore data. Theresa explains why credibility is a one-time currency and how to safeguard it across reports, social media, and public talks. She shares actionable deposition tactics, including pacing your answers, asking for breaks, and refusing to opine from flawed exhibits. Her approach centers on visual storytelling: GIS maps, groundwater animations, and simple demonstrations that bridge the gap between advanced modeling and lay understanding.

You’ll hear how venue differences—civil court, federal procedures, and Colorado’s water court with its referee process—change structure but not the essentials of good expert work. We also get into rebuttal strategy: how to evaluate opposing reports, concede valid points without losing your thesis, and frame disagreements in terms of data and methods. Underneath it all is a blueprint for strong attorney–expert relationships built on respect, clear roles, and independent judgment.

If you’re an expert curious about taking the stand, an attorney aiming to get the best from your experts, or a listener who loves the craft of clear communication, this conversation delivers practical, field-tested guidance. Subscribe, share with a colleague who needs it, and leave a review telling us your go-to tactic for keeping credibility front and center.