Over the past several decades more and more corporations and universities have turned to their intellectual property assets as a way to increase revenues. Doing so often involves litigation to show that some other corporation infringes one or more patents, a process that is usually both legally and technically complex. A key part of patent litigation is played by engineers and scientists who provide “expert” testimony about both the technology of the patent at issue and the ways in which an accused system or method may or may not infringe the claims of that patent. Technical expert witnessing involves study of the applicable “art,” assisting the litigators in understanding that art, writing reports explaining your technical opinions, and if the litigation goes that far, testifying in court about your opinions. Opportunities exist for engineers and scientists who have good academic and professional credentials and who enjoy teaching others about complex technologies. This presentation will provide an overview of the patent litigation process and the role that technical experts can play within it.