The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed.
To one degree or another, all experts rely on the attorney who hired them for the information necessary to do their work. Therefore, you should communicate frequently with the attorney to develop the necessary rapport. This may be a challenge. Generally, lawyers may not want to spend much time on a case at the beginning, as they have other cases in progress which may be closer to the trial phase. Many times you will have to do the pushing if you want to get an early start.
Your first duties are to explore the technical issues and to educate the lawyer. Recognize that the issues confronting you and the attorney with whom you are working are never black and white. Experts tend to gravitate to one point of view and negate dissenting opinions. Lawyers, on the other hand, live in a world of gray, where facts can be toned and shifted into various