Mark earned his B.A. with honors in Rhetoric from the University of California, Berkeley, and his J.D. degree from the University of California, Davis, School of Law. He is a partner in the law firm Harrison, Temblador, Hungerford and Johnson in Sacramento. As an attorney, Mark focuses primarily on land use and mining law, but Mark has also served as lead counsel for local government in matters involving local control over land use decision making. Mark has also served the Cache Creek Conservancy on the Board of Directors, and as a former President. Mark and his wife Karen live and farm on the family ranch outside Woodland where they grow walnuts and row crops.