Updated July 2019: Subject matter experts are often central figures in complex litigation. The parties to a dispute, lawyers, judges, and juries rely on expert witnesses to help sort through complicated issues. These kinds of matters often benefit from the perspective of someone with substantial industry experience, a professional certification, a doctoral degree, and the ability to communicate effectively on a witness stand. Selecting the correct expert witness is frequently the difference between winning and losing a lawsuit. The expert's opinions can inform an effective legal strategy. The following curated resources provide directories or referrals to expert witnesses. PublicLegal has received no compensation or incentive for their inclusion. This list is actively maintained, and we welcome suggested additions.