Jon Dalton counsels many of Missouri’s most successful organizations and individuals in business transactions and government/regulatory affairs.

Guiding established and emerging businesses and professionals, Jon provides strategies for growth, financing, governance, structure, and related planning matters. Jon’s clients include a broad range of entities, including manufacturers, real estate developers, health care systems and providers, pharmaceutical companies, educational institutions, e-commerce businesses and individuals involved in multiple industries and professions.

Recognizing that legislation and public policy decisions on competition, taxation, business regulation, intellectual property and other issues can impact success, Jon proactively combines his legal experience with strategic government solutions to advance his clients’ objectives. He understands the processes and players in state and local government and focuses on leveraging his extensive network of contacts to achieve positive outcomes.

In highly regulated fields such as securities, health care, education, banking, insurance, economic development and more, Jon assists with policy decisions, administrative law and regulatory compliance issues. He also works with trade associations and allied organizations to effect change across a broad range of industries, disciplines and interests.

Jon also serves as president and CEO of AT Government Strategies LLC, a subsidiary of Armstrong Teasdale.


  • Saint Louis University School of Law  (J.D., cum laude, 1986)
    • Saint Louis University Law Journal, Health Law Editor
  • University of Missouri  (B.A., 1983)
    • Economics


  • Missouri
  • Illinois
  • U.S. District Court, District of Columbia
  • U.S. District Court, Eastern District of Missouri
  • District of Columbia

Professional Activities

  • American Bar Association
  • Missouri Bar Association
  • American Health Lawyers Association

Charitable and Civic Involvement

  • St. Louis Metro Mayors Organization (Vice Chairman, 2013-2021)
  • Boy Scouts of America, New Horizons District (Chairman, 2015-2017) 
  • American Red Cross (Director)
  • Regional Commerce and Growth Association (Public Policy Council)
  • Central County Emergency 911 (Chairman, 2009-2010)
  • Friends of St. Louis University Liver Center (Director, 2008-2010)
  • Private Industry Council (St. Louis Agency on Training & Employment) (Director, 2000-2006)
  • United Way (Government Affairs Committee,  2000-2004)
  • St. Louis Sports Commission (Baseball Committee, 1998-2003)
  • Legal Advocates for Abused Women (Director, 1992-1995)
  • Long Term Care Ombudsman Program (Director, 1992-1994)
  • American Association of Homes and Services for the Aging (National Legal Committee, 1999-2003) 
  • Old Warson Country Club (President, 2011-2013;  Board of Directors,  2006-2013)
  • Jefferson City Country Club
  • Missouri Athletic Club
  • Racquet Club St. Louis


  • Mayor, Town & Country, Mo. (2005-2021)
  • The Best Lawyers in America®; Government Relations (2007-present)
  • The 100 List, The Missouri Times (2015-present)
  • Missouri Lawyers Weekly Power List, Lawyer-Lobbyists (2021-present); Top 100 Power List (2022-present); ICON Honors (2024)
  • Citizen of the Year, Town & Country, Mo. (2007)
  • Alderman, Town & Country, Mo. (2004-2005)
  • Selected as "40 Under 40" by the St. Louis Business Journal (1996)


Jon began his work in the area of legislative and regulatory affairs on the federal level, practicing law in Washington, D.C. for a number of years. His experience included lobbying on major bills under consideration by the U.S. Congress and issues of concern before various federal agencies. Since returning to Missouri, Jon has concentrated his practice on state and local government matters, including lobbying the Missouri General Assembly, state administrative agencies and local political subdivisions. His experience as both a lawyer and elected public official affords him a unique perspective and ability to serve his clients’ interests.

Contact Us
  • Worldwide
  • Boston, MA
  • Chicago, IL
  • Denver, CO
  • Dublin, Ireland
  • Edwardsville, IL
  • Jefferson City, MO
  • Kansas City, MO
  • Las Vegas, NV
  • London, England
  • Miami, FL
  • New York, NY
  • Orange County, CA
  • Philadelphia, PA
  • Princeton, NJ
  • Salt Lake City, UT
  • St. Louis, MO
  • Washington, D.C.
  • Wilmington, DE
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Boston, MA
800 Boylston St.
30th Floor
Boston, MA 02199
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Boston, Massachusetts
Chicago, IL
100 North Riverside Plaza
Suite 1500
Chicago, IL 60606-1520
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Chicago, Illinois
Denver, CO
4643 S. Ulster St.
Suite 800
Denver, CO 80237
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Denver, Colorado
Dublin, Ireland
Fitzwilliam Hall, Fitzwilliam Place
Dublin 2, Ireland
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Edwardsville, IL
115 N. Second St.
Edwardsville, IL 62025
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Edwardsville, Illinois
Jefferson City, MO
101 E. High St.
First Floor
Jefferson City, MO 65101
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Jefferson City, Missouri
Kansas City, MO
2345 Grand Blvd.
Suite 1500
Kansas City, MO 64108
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Kansas City, Missouri
Las Vegas, NV
7160 Rafael Rivera Way
Suite 320
Las Vegas, NV 89113
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Las Vegas, Nevada
London, England
Royal College of Surgeons of England
38-43 Lincoln’s Inn Fields
London, WC2A 3PE
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Miami, FL
355 Alhambra Circle
Suite 1200
Coral Gables, FL 33134
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New York, NY
7 Times Square, 44th Floor
New York, NY 10036
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Orange County, CA
19800 MacArthur Boulevard
Suite 300
Irvine, CA 92612
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Philadelphia, PA
2005 Market Street
29th Floor, One Commerce Square
Philadelphia, PA 19103
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Philadelphia, Pennsylvania
Princeton, NJ
100 Overlook Center
Second Floor
Princeton, NJ 08540
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Princeton, New Jersey
Salt Lake City, UT
222 South Main St.
Suite 1830
Salt Lake City, UT 84101
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Salt Lake City, Utah
St. Louis, MO
7700 Forsyth Blvd.
Suite 1800
St. Louis, MO 63105
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St. Louis, Missouri
Washington, D.C.
1717 Pennsylvania Avenue NW
Suite 400
Washington, DC 20006
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Wilmington, DE
1007 North Market Street
Wilmington, DE 19801
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Wilmington, Delaware