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Matt Diehr
Matthew P. Diehr
Partner
Technology, Manufacturing & Transportation
vCard
  • St. Louis, MO
  • Direct: 314.480.1916
  • Fax: 314.480.1505
  • Email matthew.diehr huschblackwell.com
  • St. Louis - Cortex
  • vCard
  • St. Louis, MO
  • Direct: 314.480.1916
  • Fax: 314.480.1505
  • matthew.diehr huschblackwell.com
  • St. Louis - Cortex
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Matthew P. Diehr

Partner
Technology, Manufacturing & Transportation
Partner
Overview
  • Overview
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  • Experience
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  • News & Insights

Matt has both first-chair and second-chair trial experience defending individual and corporate clients against alleged violations of United States criminal and civil laws.

As a member of Husch Blackwell’s Government Compliance, Investigations & Litigation team, Matt represents and advises clients in a wide variety of lawsuits and regulatory disputes across the United States. This practice has included defending individuals accused of securities fraud, healthcare fraud and public corruption. He has represented corporations combating allegations raised by qui tam relators, in asset forfeiture proceedings as to anti-money laundering issues, and in civil and criminal litigation. He also has significant experience representing individuals and corporations in alternative capacities, such as advocating for clients victimized by fraud. Recently, Matt successfully petitioned the Eighth Circuit Court of Appeals for a rare writ of mandamus compelling the U.S. District Court to recognize Husch Blackwell’s client as a victim of a Ponzi scheme.

Complementing Matt’s litigation practice, he has assisted a number of corporate clients in conducting independent investigations in response to allegations of corporate or individual wrongdoing. This experience has included allegations of corporate espionage and healthcare fraud, for example.

Matt is very active in public service and in local, state and federal bar associations. He has written several articles for the St. Louis Bar Journal, most recently on the Yates Memorandum and its effects on those accused of wrongdoing. He was recently selected as a member of the 2015-16 Missouri Bar Leadership Academy class, and he is active in the St. Louis chapter of the Federal Bar Association.

Professional Associations and Memberships

  • Bar Association of Metropolitan St. Louis
  • The Federal Bar Association, Board Member, St. Louis Chapter
  • Illinois Bar Association
  • Missouri Bar Association, Leadership Academy, class of 2015-2016

Civic Involvement

  • St. Louis University High School Alumni Board, 2012-present
  • Young Friends of the Arc, Board Member, 2012-present

News & Insights

  • Speaker, Rising Professionals Symposium 2018, Substantive Law, February 2-3, 2018
  • The Missouri Bar: So, Now You Need...CLE
  • Data Security Breach at OSHA? False Alarm – This Time
View More +

Experience

  • Obtained jury verdict for compensatory and punitive damages in United States District Court for the Southern District of Illinois.
  • Member of team that successfully represented employees of a Major League Baseball team in a data breach, corporate espionage matter.
  • Assisted in the representation Fortune 500 company in high profile corporate espionage and deceptive trade secrets case.
  • Obtained early dismissal qui tam matter before the U.S. District Court, District of Colorado.
  • Obtained writ of mandamus from Eighth Circuit Court of Appeals compelling the U.S. District Court for the Eastern District of Missouri to recognize client as victim of a Ponzi scheme.

News & Insights

March 19, 2018 In The News Danforth Center Roots and Shoots Blog: Venture Cafe Night - Going Global External Link
Technology, Manufacturing & Transportation
February 2018 Speaking Engagement Speaker, Rising Professionals Symposium 2018, Substantive Law, February 2-3, 2018
December 13, 2017 Article The Missouri Bar: So, Now You Need...CLE External Link
December 7, 2017 In The News Clayton Times: Husch Blackwell elects 18 to partnership External Link
Financial Services & Capital Markets Healthcare, Life Sciences & Education Real Estate, Development & Construction Technology, Manufacturing & Transportation
December 4, 2017 News Releases Husch Blackwell Elects 18 to Partnership
Energy & Natural Resources Financial Services & Capital Markets Healthcare, Life Sciences & Education Real Estate, Development & Construction Technology, Manufacturing & Transportation
August 31, 2017 Blog Data Security Breach at OSHA? False Alarm – This Time External Link
2017 Article Author, "Identifying, Protecting, and Enforcing Trade Secrets After the DTSA," The Illinois Manufacturer, Summer 2017 Attachment Link
March 1, 2017 Blog DOJ’s New Guidance on Compliance Programs External Link
Technology, Manufacturing & Transportation
November 30, 2016 Speaking Engagement Trade Secret Litigation in Federal Courts, Federal Bar Association CLE program
June 20, 2016 Blog Husch Blackwell Files One of First Lawsuits Brought Under the Defend Trade Secrets Act of 2016 (DTSA) External Link
Technology, Manufacturing & Transportation
View More +
  • Industry Focus
    • Technology, Manufacturing & Transportation
  • Practice Areas
    • Appellate
    • Business Litigation
    • Data Privacy, Security & Breach Response
    • Healthcare Investigations and Government Enforcement
    • Manufacturing
    • Government Compliance, Investigations & Litigation
    • Government Solutions
    • Qui Tam / False Claims Act
    • Tax Controversy
    • Trade Secret & Business Information Protection
  • Admissions
    • Missouri, 2009
    • Illinois, 2011
    • U.S. District Court, District of Colorado, 2015
    • U.S. District Court, District of Kansas, 2014
    • U.S. District Court, Eastern District of Missouri, 2009
    • U.S. District Court, Southern District of Illinois, 2014
    • U.S. District Court, Western District of Missouri, 2009
    • U.S. Court of Appeals, Eighth Circuit, 2012
    • U.S. Court of Appeals, Tenth Circuit, 2016
    • U.S. Tax Court, 2013
  • Education
    • J.D., Saint Louis University School of Law, 2009, cum laude
      • Saint Louis University Law Journal, editor
      • Academic Excellence Awards for highest grades in Antitrust Laws, Business Associations, Constitutional Law, Contracts, Criminal Procedure and Property  
    • B.A., Political Economy and Political Science, Tulane University, 2006, cum laude
      • Dean’s Honor Scholarship 
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