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John D. Mayne is a native of Sioux City.  He is a graduate of Harvard College (1970) and the Drake University Law School, with honors, (1976).  He served three years as an officer in the U.S. Navy, including one tour aboard a destroyer in the VietNam combat zone.  He has been in private practice in Sioux City since 1976, practicing primarily in civil litigation.  He has tried dozens of cases to juries in state and federal court throughout Northwest Iowa.  His experience includes litigation of many types and representing either plaintiffs or defendants whether in personal injury, commercial, products liability, professional malpractice (attorney, physician, engineer, real estate broker, insurance broker, accountant, title abstractor), aircraft crash, and securities fraud.  He is also experienced in probating decedents’ estates and handling real estate title and litigation issues. 

John has held a variety of leadership positions in state and local bar associations.  He served for six years representing Sioux City lawyers on the Board of Governors of the Iowa State Bar Association.  He also served as Chairman of the Federal Practice Committee of the Iowa Bar.  John was appointed to serve on the Iowa Supreme Court’s Advisory Committee on Rules of Civil Procedure.  In 2004 he directed the International Association of Defense Counsel’s (IADC) annual Open Forum on Masters of Trial Advocacy, and the IADC has honored him by selecting him to be on the 2005 Faculty of its Trial Academy.  He is Fellow of the Iowa Academy of Trial Lawyers.  He is a member of the Iowa Defense Counsel Association, the Defense Research Institute. 

John is licensed to practice in the courts of Iowa and South Dakota.  He is licensed to practice in the federal courts of Iowa, Nebraska, the Eight Circuit Court of Appeals and the Supreme Court of the United States.  He has litigated cases in the Permanent Judicial Commissions of the Presbyterian Church, USA. 

He has been very active in civic affairs, serving on numerous charitable and civic association boards, most notably having been elected to serve on the Sioux City Community School District’s Board of Directors, one year as President.   He is a Fellow of the Iowa State Bar Association Foundation. 

John is an avid semi-professional cellist, performing regularly in the Sioux City Symphony Orchestra.  His is also a golfer and hunter.  He is active in Republican politics and was the Treasurer of Hon. Tom Latham’s (R-IA) campaign committee and the three-time Woodbury County chairman of Sen. Charles Grassley’s (R-IA) campaigns.



Bikakis, Mayne, Arneson & Hindman. 701 Pierce St. Suite 300 P.O. Box 1678 Sioux City, IA 51102
(712) 277-1434 (712) 255-8049 Fax