About Us The Law Offices of John A. Guthrie is a trusted law firm in Pleasanton, California focused on all matters in family law. We established this law firm in the early 90's with the goal of helping people with both simple and complex legal issues. We have developed a reputation for being a team of aggressive, ethical attorneys that are committed to their clients. Whether you need help with your divorce, custody, parenting time, paternity, or support issues, we are here to assist you. Call for a free initial consultation!