Best Lawyers logo
  • Lawyers
  • Methodology
  • NEW! Ones to Watch
  • Partnerships
  • Nominate a Lawyer
  • Log In
  • Lawyers
    • Advanced Search
    • COVID-19 Assistance
    • Featured Ones to Watch
    • Lawyer of the Year
    • Highlighted Lawyers
    • Nominate a Lawyer
  • Methodology
    • Overview
    • Ones to Watch
    • Editorial Timelines
    • Practice Areas
    • Publicizing Guidelines
    • FAQ
  • Publications
    • Employment Law
    • Pennsylvania
    • New England
    • Connecticut
    • Injury & Malpractice
    • Georgia
    • Colorado
    • Real Estate
    • Family Law
    • Canada
    • New York Area
    • Southern California
    • South Florida
    • Northern California
    • Tampa
    • Global
    • Midwest
    • Washington, D.C.
    • Litigation
    • Australia
    • Texas
  • Legal Insights
    • Featured Articles
    • In the News
    • Advisory Board
    • Meet the Board
    • Press & Events
  • About
    • Global Presence
    • Company History
    • Leadership
  • Ones to Watch
  • Partnerships
  • Nominate a Lawyer
  • Log In Log In
  • Nominate a Lawyer
  • Log In

Lawyer Profile

Image of Sean R. Gallagher

Sean R. Gallagher

Polsinelli PC
  • Recognized Since:
    2011
  • Recognized in:
    Commercial Litigation
    Litigation - Labor and Employment
  • Lawyer Page:
    http://www.polsinelli.com/sgal...
  • Website:
    https://www.polsinelli.com
  • Location:
    1401 Lawrence Street, Suite 2300
    Denver, CO 80202
For more than 25 years, Sean Gallagher has handled a broad range of strategic counseling and litigation matters in courtrooms across the country, including a successful oral argument in the Supreme Court of the United States. His practice emphasizes three general areas: complex commercial litigation, employment litigation/counseling, and constitutional/public policy matters. Representative commercial litigation experience includes cases involving claims for fraud and misrepresentation, securities fraud, antitrust violations, consumer protection violations, trademark and copyright infringements, environmental whistleblowing, violations of the False Claims Act, and corporate governance disputes.

Mr. Gallagher also assists his clients in implementing proactive employment policies that minimize the risk of litigation. When necessary, however, he represents employers in litigation involving non-compete agreements, employment discrimination, civil rights violations, Sarbanes-Oxley violations, retaliatory discharge, breach of contract, ERISA violations and libel/slander. He also has extensive experience with negotiating and litigating executive employment agreements, representing both executives and employers. Mr. Gallagher is one of the founding editors of The Practitioner's Guide to Colorado Employment Law, the state’s definitive treatise on employment law since 1999.

Mr. Gallagher has also handled a broad spectrum of public policy, constitutional, and election matters, including several First Amendment cases of national significance. He successfully represented two U.S. Secret Service agents in the Supreme Court of the United States in Reichle v. Howards, 566 U.S. ___ (2012), where he obtained a unanimous decision on behalf of his clients in a case involving the scope of civil liability of Secret Service agents protecting the President and Vice-President. He successfully represented a member of the President’s advance team in a case involving alleged viewpoint discrimination by the White House (Weise v. Casper, 593 F.3d 1163, cert. denied 131 S.Ct. 7 (2010)). He represented the telemarketing industry in a constitutional challenge to the FTC and FCC’s Do Not Call registry (Mainstream Marketing Svcs. v. FTC, 359 F.3d 1228 (10th Cir. 2004) as well as a state university in a First Amendment retaliatory termination case (Kemp. v. State Bd. of Agriculture, 803 P.2d 498 (Colo. 1990). Mr. Gallagher has also represented the governor of Colorado in the state's congressional redistricting litigation, a U.S. Congressman in a congressional election recount and three presidential campaigns.

As an adjunct to his litigation practice, Mr. Gallagher has nationally recognized experience in the field of electronic discovery. He is a member of The Sedona Conference’s Working Group on Best Practices for Electronic Document Retention and Production, and helped lead a team which drafted the conference’s commentary on “Proportionality in the e-Discovery Process.” He has lectured extensively on electronic discovery matters.

Prior to joining Polsinelli Shughart, Mr. Gallagher was a partner in the international law firms Hogan & Hartson and Hogan Lovells. He is a frequent lecturer on litigation related topics, having taught at more than 130 training programs in the last ten years.  Mr. Gallagher taught for several years at the University of Denver's Sturm College of Law.  He was appointed by the Governor of Colorado in 2000 to a six-year term on the Colorado Supreme Court Nominating Commission, which fills the vacancies on the Colorado Supreme Court and the Court of Appeals, and served on the governor’s Year 2000 Task Force to insure Y2K readiness.  Mr. Gallagher presently serves on the boards of directors of Junior Achievement-Rocky Mountain, Inc., Rocky Mountain Human Services, and the Faculty of Federal Advocates. 
Continue Reading
  • Lawyer Bio
  • Client Comments
  • Lawyer Practice Areas
  • Firm Details
  • News & Media

Lawyer Bio

For more than 25 years, Sean Gallagher has handled a broad range of strategic counseling and litigation matters in courtrooms across the country, including a successful oral argument in the Supreme Court of the United States. His practice emphasizes three general areas: complex commercial litigation, employment litigation/counseling, and constitutional/public policy matters. Representative commercial litigation experience includes cases involving claims for fraud and misrepresentation, securities fraud, antitrust violations, consumer protection violations, trademark and copyright infringements, environmental whistleblowing, violations of the False Claims Act, and corporate governance disputes.

Mr. Gallagher also assists his clients in implementing proactive employment policies that minimize the risk of litigation. When necessary, however, he represents employers in litigation involving non-compete agreements, employment discrimination, civil rights violations, Sarbanes-Oxley violations, retaliatory discharge, breach of contract, ERISA violations and libel/slander. He also has extensive experience with negotiating and litigating executive employment agreements, representing both executives and employers. Mr. Gallagher is one of the founding editors of The Practitioner's Guide to Colorado Employment Law, the state’s definitive treatise on employment law since 1999.

Mr. Gallagher has also handled a broad spectrum of public policy, constitutional, and election matters, including several First Amendment cases of national significance. He successfully represented two U.S. Secret Service agents in the Supreme Court of the United States in Reichle v. Howards, 566 U.S. ___ (2012), where he obtained a unanimous decision on behalf of his clients in a case involving the scope of civil liability of Secret Service agents protecting the President and Vice-President. He successfully represented a member of the President’s advance team in a case involving alleged viewpoint discrimination by the White House (Weise v. Casper, 593 F.3d 1163, cert. denied 131 S.Ct. 7 (2010)). He represented the telemarketing industry in a constitutional challenge to the FTC and FCC’s Do Not Call registry (Mainstream Marketing Svcs. v. FTC, 359 F.3d 1228 (10th Cir. 2004) as well as a state university in a First Amendment retaliatory termination case (Kemp. v. State Bd. of Agriculture, 803 P.2d 498 (Colo. 1990). Mr. Gallagher has also represented the governor of Colorado in the state's congressional redistricting litigation, a U.S. Congressman in a congressional election recount and three presidential campaigns.

As an adjunct to his litigation practice, Mr. Gallagher has nationally recognized experience in the field of electronic discovery. He is a member of The Sedona Conference’s Working Group on Best Practices for Electronic Document Retention and Production, and helped lead a team which drafted the conference’s commentary on “Proportionality in the e-Discovery Process.” He has lectured extensively on electronic discovery matters.

Prior to joining Polsinelli Shughart, Mr. Gallagher was a partner in the international law firms Hogan & Hartson and Hogan Lovells. He is a frequent lecturer on litigation related topics, having taught at more than 130 training programs in the last ten years.  Mr. Gallagher taught for several years at the University of Denver's Sturm College of Law.  He was appointed by the Governor of Colorado in 2000 to a six-year term on the Colorado Supreme Court Nominating Commission, which fills the vacancies on the Colorado Supreme Court and the Court of Appeals, and served on the governor’s Year 2000 Task Force to insure Y2K readiness.  Mr. Gallagher presently serves on the boards of directors of Junior Achievement-Rocky Mountain, Inc., Rocky Mountain Human Services, and the Faculty of Federal Advocates. 
Read more on firm website
  • Award List

Recognized in The Best Lawyers in America for work in:

  • Commercial Litigation
  • Litigation - Labor and Employment
 

Lawyer Client Comments

-

Lawyer Practice Areas

Key: Awarded in Best Lawyers Not Currently Awarded for this Area in Best Lawyers

Firm Details

Image for Polsinelli PC View Firm Profile
Polsinelli PC
https://www.polsinelli.com
 
Headquarters
900 West 48th Place, Suite 900
Kansas City, MO 64112
816-753-1000
27 Office Locations
in 1 Country

United States

United States

Arizona

Arizona

Phoenix, AZ

One East Washington Street, Suite 1200

Phoenix, AZ 85004

United States

602-650-2000

Get Directions

California

California

Los Angeles, CA

2049 Century Park East, Suite 2900

Los Angeles, CA 90067

United States

310-556-1801

Get Directions

Palo Alto, CA

3000 El Camino Real

Building 4, Suite 200

Palo Alto, CA 94306

United States

650-461-7700

Get Directions

San Francisco, CA

Three Embarcadero Center, Suite 2400

San Francisco, CA 94111

United States

415-248-2100

Get Directions

Colorado

Colorado

Denver, CO

1401 Lawrence Street, Suite 2300

Denver, CO 80202

United States

303-572-9300

Get Directions

Delaware

Delaware

Wilmington, DE

222 Delaware Avenue, Suite 1101

Wilmington, DE 19801

United States

302-252-0920

Get Directions

District of Columbia

District of Columbia

Washington, DC

1401 Eye ("I") Street, NW, Suite 800

Washington, DC 20005

United States

202-783-3300

Get Directions

Florida

Florida

Miami, FL

315 S. Biscayne Blvd Suite 400

Miami, FL 33131

United States

305-921-1800

Get Directions

Georgia

Georgia

Atlanta, GA

1201 West Peachtree Street, NW, Suite 1100

Atlanta, GA 30309

United States

404-253-6000

Get Directions

Illinois

Illinois

Chicago, IL

150 North Riverside Plaza, Suite 3000

Chicago, IL 60606

United States

312-819-1900

Get Directions

Kansas

Kansas

Overland Park, KS

6201 College Boulevard, Suite 500

Overland Park, KS 66211

United States

913-451-8788

Get Directions

Topeka, KS

100 Southeast Ninth Street, Suite 250

Topeka, KS 66612

United States

785-233-1446

Get Directions

Massachusetts

Massachusetts

Boston, MA

One International Place, Suite 3900

Boston, MA 02110

United States

614-406-0335

Get Directions

Missouri

Missouri

Clayton, MO

101 South Hanley, Suite 1225

Clayton, MO 63105

United States

314-889-8000

Get Directions

Jefferson City, MO

221 Bolivar Street, Suite 300

Jefferson City, MO 65101

United States

573-636-8135

Get Directions

Springfield, MO

Hammons Tower, Suite 1200

901 East St. Louis Street

Springfield, MO 65806

United States

417-869-3353

Get Directions

St. Joseph, MO

2501 Frederick Avenue, Suite 200

St. Joseph, MO 64506

United States

816-364-2117

Get Directions

St. Louis, MO

100 South Fourth Street, Suite 1000

St. Louis, MO 63102

United States

314-889-8000

Get Directions

St. Louis, MO

7733 Forsyth Boulevard, Suite 750

St. Louis, MO 63105

United States

314-889-8000

Get Directions

New York

New York

New York, NY

600 Third Avenue, 42nd Floor

New York, NY 10016

United States

212-684-0199

Get Directions

North Carolina

North Carolina

Raleigh, NC

555 Fayetteville Street, Suite 720

Raleigh, NC 27601

United States

919-832-1744

Get Directions

Tennessee

Tennessee

Chattanooga, TN

Liberty Tower, Suite 900

605 Chestnut Street

Chattanooga, TN 37450-0011

United States

423-321-7979

Get Directions

Nashville, TN

401 Commerce Street, Suite 900

Nashville, TN 37219

United States

615-259-1510

Get Directions

Texas

Texas

Dallas, TX

2950 North Harwood, Suite 2100

Dallas, TX 75201

United States

214-397-0030

Get Directions

Houston, TX

1000 Louisiana Street, Suite 6400

Houston, TX 77002

United States

713-374-1600

Get Directions

Washington

Washington

Seattle, WA

1000 Second Avenue, Suite 3500

Seattle, WA 98104

United States

206-393-5400

Get Directions

News & Media

Featured Publications

Cover for our publication
 
Add Comment
In making your comments, please do not refer to a pending legal matter.
(*) Required Fields
There was an error during saving, please try again.
If you continue to get this message, please contact us at info@bestlawyers.com or 803.648.0300 for assistance.
Please complete the captcha then submit.
Your comment was saved successfully!
Thank you for your feedback.
  • Find a Lawyer
  • Nominate a Lawyer
  • Legal Insights
  • Contact Us
  • Newsletter
Lawyers 
  • Advanced Search
  • COVID-19 Assistance
  • Featured Ones to Watch
  • Lawyer of the Year
  • Highlighted Lawyers
  • Nominate a Lawyer
  • Find a Lawyer
Methodology
  • Overview
  • Ones to Watch
  • Editorial Timelines
  • Practice Areas
  • Publicizing Guidelines
  • FAQ
Publications
  • Business Editions
  • Regional Editions
  • Partnerships
  • Become a Contributor
Legal Insights
  • Featured Articles
  • In the News
  • Advisory Board
  • Meet the Board
  • Press & Events
  • Best Law Firms
About
  • Global Presence
  • Company History
  • Leadership
  • Founders
  • Press Releases
  • Testimonials
  • Contact Us
  • Careers
My Account
  • Log In
  • Store
  • Marketing Guidance
Best Lawyers Best Lawyers logo +1-803-648-0300
801 Broad Street, Suite 950 Augusta, GA 30901
  • Twitter
  • LinkedIn
  • Facebook
  • Privacy Policy
  • Cookie Policy
  • Terms and Conditions
  • Lawyer Directory
  • Best Law Firms

© 2010-2022 Best Lawyers — All Rights Reserved.