Judge Bostwick was born and raised in Augusta, Kansas. He attended the University of Kansas where he earned first an undergraduate degree in business and then a law degree in 1968. In law school, he was a member of the Board of Editors and a Managing Editor of the Kansas Law Review and a member of Order of the Coif.
Upon graduation from law school, he joined the Wichita law firm of Adams, Jones, Robinson and Malone where he practiced for thirty-one years before his appointment as U.S. Magistrate Judge on July 22, 1999. His law practice was mainly in the area of commercial litigation and he also acted as a mediator in state and federal cases.
Judge Bostwick is a fellow of the American College of Trial Lawyers and a fellow of the American Bar Foundation and the Kansas Bar Foundation. He was President of the Wichita Bar Association in 1990-91. He has been a member of the Kansas Bar Journal Board of Editors since 1982 and was Chair of the Board in 1991-94. In 1994, he received the Kansas Bar Association Outstanding Service Award for service on the Bar Journal and in 1999 he received the Distinguished Alumnus Citation from the University of Kansas School of Law.