Becoming an expert witness typically requires a combination of education, experience, and specialized knowledge in a particular field. Expert witnesses are often called upon to provide testimony in legal cases, and they may be required to have a deep understanding of their area of expertise, as well as the ability to communicate complex information in a clear and understandable way. In addition to their expertise, expert witnesses must also be able to remain impartial and provide testimony that is based on sound scientific principles and evidence.