John Holtz

Senior Associate Attorney

Joan Coté, Assistant


Bar Admissions

  • Nebraska & Iowa

  • District of Nebraska

  • U.S. Court of Federal Claims


  • J.D., Washington University School of Law

  • B.A., University of Nebraska-Lincoln

Professional Associations & Memberships

  • Nebraska Bar Association


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John is an Senior Associate at Koprince McCall Pottroff LLC. Prior to joining the firm, John practiced law in an extensive variety of areas, ranging from supplying insurers expert legal representation in civil litigation, to winning benefits for the disabled in Social Security administrative hearings, to being the general counsel of a startup company in Omaha, NE. This wide berth of experience gives John the adaptability and resourcefulness needed to help clients navigate the world of government contracts, be it on a transactional basis or in litigation. 

At Washington University School of Law, John excelled in all areas of study, graduating with cum laude honors. He further served as an editor on the school’s prestigious Jurisprudence Review, was a member of the school’s appellate clinic that won a case at the Sixth Circuit Court of Appeals and worked during school as a law clerk for Judge Richard Webber in the Eastern District of Missouri. John received his B.A. from the University of Nebraska-Lincoln, where he majored in economics and minored in political science. 

Outside the workplace, John is an active member of the community, involved with various charitable groups and volunteer activities. He enjoys weightlifting, running, reading, and tinkering with the computer he built. He is a devout fan of the Pittsburgh Penguins, the Cleveland Browns, the Pittsburgh Pirates, and, most of all, the Nebraska Cornhuskers. We try not to give him too hard of a time for being a Husker. 

Speaking Engagements 
  • “Government Contracting Updates”, Presenter, Webinar from University of Nebraska Omaha PTAC 2022

  • "Top 10 Legal Misconceptions in Federal Contracting and Pending Legal Changes"​, Co-Presenter, Ohio PTAC 2022​

  •  "FAR Department Supplement - AFARS - Army", Panelist, Jennifer Schaus Webinar 2022

Recent Publications