One skill that is absolutely essential for any good trial lawyer is the ability to work well with witnesses on both sides of the dispute. Witness testimony, and how the jury perceives it, can make or break a case.
In-house counsel have a significant role to play when it comes to witness testimony. They often have the best and most direct access to both company witnesses and any experts who may also be called upon to testify in the case. In-house counsel also generally take a significant role in choosing witnesses, though the trial lawyers they hire should have input as to whether or not a particular witness will help or hinder the case.