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John Holtz

Senior Associate Attorney

Rhonda Burgess, 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

  • “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, 2022 Corporate Partner Advisory Group (CPAG) Webinar

  • "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

  • "FAR Supplement - AFARS - Army", Co-Presenter, 2022 Jennifer Schaus & Associates Webinar

  • "Teaming and Partnering Strategies", Co-Presenter, 2022 Nebraska PTAC -University of Nebraska at Omaha Webinar

  • "Limitations on Subcontracting: A Step-by-Step Compliance Guide (Update 2022)", Co-Presenter, 2022 Govology Webinar

  • "Buy American Act", Co-Presenter, 2022 Nebraska PTAC -University of Nebraska at Omaha Webinar

Recent Publications

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