John Holtz

John HoltzJohn is a 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.

Bar Associations

  • Nebraska
  • Iowa
  • U.S. Court of Federal Claims


  • J.D., Washington University School of Law
  • B.A., University of Nebraska-Lincoln

Professional Associations & Memberships

  • Nebraska State Bar Association


  • “JV’s & Teaming”, Co-Presenter, Texas APEX -El Paso Community College Contract Opportunities Center, 2024.
  • Mentor Protégé and Legal Aspects to be Mindful Of”, Co-Presenter, Catalyst Center for Business & Entrepreneurship, 2024.
  • “Felons & the 8(a) Program”, Interviewee, K. Parks Consulting, Inc, 2024.
  • “Regulatory Updates in Government Contracting”, Co-Presenter, Texas APEX -El Paso Community College Contract Opportunities Center, 2024.
  • “MyGovWatch Podcast with Nick Bernardo”, Panelist,, 2024.
  • “Meet the Buyers Conference in Scottsbluff, Nebraska”, Nebraska APEX Accelerators, Presenter 2023.
  • “Podcast: Understanding the 8(a) Lawsuit and Its Impact: Attorney John Holtz Reveals All”, K. Parks Consulting 2023.
  • “NAICS Codes: Six Impactful Digits for Federal Contractors (2023 Update)”, Co-Presenter, Govology 2023.
  • “Compliant and Effective Teaming Agreements, Joint Ventures & Subcontracts – 3-Part Series (2023 Update)”, Co-Presenter, Govology 2023.
  • “SBA Contracting Changes”, Co-Presenter, Corporate Partner Advisory Group (CPAG) 2023.
  • “Understanding and Obtaining HUBZone Certification (2023 Update), Co-Presenter, Govology 2023.
  • “New Legislative Changes That May Affect Your Small GOVCON Business”, Co-Presenter, Catalyst Center for Business 7 Entrepreneurship Webinar 2023.
  • “Regulatory Updates in Government Contracting”, Co-Presenter, Texas PTAC – El Paso Webinar 2023.
  • “Buy American Act & Trade Agreements”, Co-Presenter, Texas PTAC- El Paso Webinar 2023.
  • “Government Contracting Updates”, Co-Presenter, Webinar from University of Nebraska Omaha PTAC 2022.
  • “Non-manufacturing Rule”, Co-Presenter, 2022 U.S. Small Business Administration (SBA) Webinar.
  • “Government Contracting Updates”, Co-Presenter, 2022 Nebraska PTAC -University of Nebraska at Omaha Webinar.
  • “Top 10 Legal Misconceptions in Federal Contracting & Pending Legal Changes”, Co-Presenter, 2022 Ohio PTAC Webinar.
  • “Teaming and Partnering Strategies”, Co-Presenter, 2022 Nebraska PTAC -University of Nebraska at Omaha Webinar.
  • “FAR Supplement – AFARS – Army.” Webinar from Jennifer Schaus & Associates, 2022.
  • “Limitations on Subcontracting: A Step-by-Step Compliance Guide (2022 & 2023 Update).” Webinar from Govology, 2022 & 2023.
  • “Buy American Act”, Co-Presenter, 2022 Nebraska PTAC -University of Nebraska at Omaha Webinar.

Recent Publications