Patrick Costello is a nationally recognized authority on agricultural law, estate planning, taxation, and business planning. He is a member of the Minnesota, Iowa, and Nebraska Bar. Costello is the Past President of the American Agricultural Law Association. He is a Fellow in the American College of Trust and Estate Counsel and a Director of the Minnesota State Bar Foundation. He was appointed to the Center for Rural Policy and Development by the Governor of Minnesota.
Costello has served on the Board of Governors of the Minnesota State Bar Association and chaired their Sections on Agricultural Law and Outstate Practice. He is the author of numerous continuing legal education articles on agricultural law and taxation. In the American Bar Association, he served as co-chair of the Animal Law Committee of the Section of Tort, Trial and Insurance Practice and is a member of the Real Property, Trust and Estate Section. Since 1977 he has practiced law in his home town of Lakefield, Minnesota as a member of the 8th oldest law firm in the State of Minnesota.