About Us


In order to provide clients with the most comprehensive range of services possible, Armstrong Teasdale has established a group of subsidiary organizations as well as key law firm network affiliations, allowing us to provide resources worldwide.


Sometimes the issues of our clients require a skill set or technical expertise outside of the legal profession. To provide better solutions to our clients in those situations, we've formed subsidiaries and business units, and have affiliated with other entities to deliver the required services. The beauty is the collaboration between our lawyers and other professionals for the benefit of our clients.

ATGS provides government relations and strategic counsel to advance the business objectives of companies, industry associations and other entities. Our bipartisan team of lawyers, lobbyists and political consultants has a long track record of success helping shape public policy, legislation and regulations on behalf of clients at the federal, state and local levels of government. Contact Partner Jonathan F. Dalton.

Utilizing state-of-the-art software, Lawgical Choice provides litigation support services nationwide for law firms and in-house legal departments. Services range from organizing and analyzing case information to adding visual drama to evidence, digitally recording depositions and equipping a courtroom with cutting-edge presentation technology. Contact Partner John Cowling.

Armstrong Teasdale has affiliated with an online commercial crowdfunding site called Selequity. The site provides accredited investors exposure to professionally operated, private real estate investment deals. Likewise, commercial real estate owners (sponsors) can use the Selequity network to access a broader range of accredited investors. The firm is a co-founder of the platform.

Other Affiliations

Armstrong Teasdale's other affiliations, including memberships in legal networks, allow us to provide resources for our clients worldwide.

Armstrong Teasdale is the exclusive member firm in Missouri for Lex Mundi – the world’s leading network of independent law firms with in-depth experience in 125+ countries worldwide. As part of the Lex Mundi global network, we can provide our clients with preferred access to more than 22,000 lawyers around the world – all from a single point of contact. Working with other Lex Mundi firms, we are able to seamlessly handle our clients’ most challenging cross-border transactions and disputes.

Armstrong Teasdale is a member of the Alliuris Group (Alliance of International Business Lawyers), a global network of law firms with offices in 36 cities around the world. Alliuris members are independent law firms with a particular focus on European and international law. Our partnership provides clients the assurance that we can deliver comprehensive and constructive support in cross-border cases.

As a member of United States Law Firm Group, with 6,000 attorneys practicing in 17 firms, we can refer clients to firms across the country that meet their specific geographic requirements.

Armstrong Teasdale is the Missouri member of State Law Resources, Inc. (SLR), a national network of 46 independent law firms with unique experience in administrative, regulatory, and government relations at the state and federal levels. Partner Sherry L. Doctorian is chair of the SLR board of directors.

Cousins Allied Strategic Advisors, LLC

CASA provides high-level strategic advice to companies doing business across the country. For more information, contact President and CEO Steven Cousins.

Contact Us
  • Worldwide
  • Boston, MA
  • Denver, CO
  • Edwardsville, IL
  • Jefferson City, MO
  • Kansas City, MO
  • Las Vegas, NV
  • London, England
  • New York, NY
  • Philadelphia, PA
  • Princeton, NJ
  • Salt Lake City, UT
  • St. Louis, MO
  • Wilmington, DE
abstract image of world map
Boston, MA
800 Boylston St.
30th Floor
Boston, MA 02199
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Boston, Massachusetts
Denver, CO
4643 S. Ulster St.
Suite 800
Denver, CO 80237
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Denver, Colorado
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
3770 Howard Hughes Parkway
Suite 200
Las Vegas, NV 89169
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Las Vegas, Nevada
London, England
200 Strand
London, WC2R 1DJ
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New York, NY
919 Third Ave., 37th Floor
New York, NY 10022
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New York City
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
201 South Main Street
Suite 750
Salt Lake City, UT 84111
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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
Wilmington, DE
300 Delaware Avenue
Suite 210
Wilmington, DE 19801
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Wilmington, Delaware