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
    • Family Law
    • New York Area
    • Canada
    • South Florida
    • Southern California
    • Northern California
    • Tampa
    • Midwest
  • 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 William B. Mateja

William B. Mateja

Sheppard Mullin Richter & Hampton LLP
  • Recognized Since:
    2010
  • Recognized in:
    Commercial Litigation
    Criminal Defense: White-Collar...
  • Website:
    https://www.sheppardmullin.com
  • Location:
    2200 Ross Avenue, 24th Floor
    Dallas, TX 75201

Bill Mateja is a partner in the Government Contracts, Investigations & International Trade Practice Group in the firm's Dallas office. He specializes in White Collar Defense and Corporate Investigations.

Unlike many attorneys, Bill does not expect repeat business. Clients he works with are usually facing the kinds of high-stakes, high-stress problems that are not likely to recur — a financial services company under SEC investigation, a hospital accused of Medicare fraud, or a C-suite executive charged with fraud or insider trading. These clients turn to Bill to address and resolve the issues, while minimizing the impact to their businesses and reputations.

Bill has long been a white collar trial lawyer with a particular focus on healthcare fraud and securities enforcement. A former prosecutor at the highest levels of the Department of Justice, Bill was responsible for all the Department’s white collar operations, as well as the day-to-day workings of its corporate fraud task force. He also served as Special Counsel for Health Care fraud overseeing all of the Department’s health care fraud enforcement. This experience makes him unusually adept at handling the collateral consequences of white collar matters, which can occur in any of four separate legal forums — criminal, civil, administrative, and regulatory — sometime all at once.

Bill has a deep understanding of each of these forums, and he regularly demonstrates that “the best defense is a good prosecutor.” He maintains strong relationships in U.S. Attorney’s Offices around the country, as well as at the SEC and various state and federal enforcement agencies nationwide. The benefit to clients is that Bill not only thinks like a prosecutor, but at times, he is a contemporary to the prosecutor or investigating attorney assigned to his case. His goal in every matter is to see that business continues with the least amount of disruption, and that each individual receives not only an aggressive defense, but one that is acceptable and comfortable for the client.

Continue Reading
  • Lawyer Bio
  • Client Comments
  • Firm Details

Lawyer Bio

Bill Mateja is a partner in the Government Contracts, Investigations & International Trade Practice Group in the firm's Dallas office. He specializes in White Collar Defense and Corporate Investigations.

Unlike many attorneys, Bill does not expect repeat business. Clients he works with are usually facing the kinds of high-stakes, high-stress problems that are not likely to recur — a financial services company under SEC investigation, a hospital accused of Medicare fraud, or a C-suite executive charged with fraud or insider trading. These clients turn to Bill to address and resolve the issues, while minimizing the impact to their businesses and reputations.

Bill has long been a white collar trial lawyer with a particular focus on healthcare fraud and securities enforcement. A former prosecutor at the highest levels of the Department of Justice, Bill was responsible for all the Department’s white collar operations, as well as the day-to-day workings of its corporate fraud task force. He also served as Special Counsel for Health Care fraud overseeing all of the Department’s health care fraud enforcement. This experience makes him unusually adept at handling the collateral consequences of white collar matters, which can occur in any of four separate legal forums — criminal, civil, administrative, and regulatory — sometime all at once.

Bill has a deep understanding of each of these forums, and he regularly demonstrates that “the best defense is a good prosecutor.” He maintains strong relationships in U.S. Attorney’s Offices around the country, as well as at the SEC and various state and federal enforcement agencies nationwide. The benefit to clients is that Bill not only thinks like a prosecutor, but at times, he is a contemporary to the prosecutor or investigating attorney assigned to his case. His goal in every matter is to see that business continues with the least amount of disruption, and that each individual receives not only an aggressive defense, but one that is acceptable and comfortable for the client.

Read more on firm website
  • Award List
  • Lawyer of the Year Badge

Named "Lawyer of the Year" by Best Lawyers for:

  • Litigation - Securities, Dallas/Fort Worth (2021)
 

Recognized in The Best Lawyers in America for work in:

  • Commercial Litigation
  • Criminal Defense: White-Collar
  • Litigation - Regulatory Enforcement (SEC, Telecom, Energy)
  • Litigation - Securities
 

Lawyer Client Comments

Firm Details

Image for Sheppard Mullin Richter & Hampton LLP View Firm Profile
Sheppard Mullin Richter & Hampton LLP
https://www.sheppardmullin.com
 
Headquarters
333 South Hope Street, 43rd Floor
Los Angeles, CA 90071
(213) 620.1780
15 Office Locations
in 5 Countries

Belgium

Belgium

Brussels, Belgium

IT Tower

Avenue Louise 480

Brussels 1050

Belgium

32 2 290 7900

Get Directions

China: Global Firms

China: Global Firms

Shanghai, China: Global Firms

26th Floor, Wheelock Square

1717 Nanjing Road West

Shanghai 200040

China: Global Firms

86 21 2321 6000

Get Directions

South Korea

South Korea

Jung-gu

Jung-gu

Seoul, Jung-gu

Foreign Legal Consultant Office

West Tower 23rd Floor Mirae Asset Center One Building

Seoul, Jung-gu 100-210

South Korea

82 2 6030 3000

Get Directions

United Kingdom

United Kingdom

London, United Kingdom

25 Southampton Buildings

London WC2A 1AL

United Kingdom

44 20 7199 5956

Get Directions

United States

United States

California

California

Costa Mesa, CA

650 Town Center Drive, Tenth Floor

Costa Mesa, CA 92626

United States

(714) 513.5100

Get Directions

Los Angeles, CA

1901 Avenue of the Stars, Suite 1600

Los Angeles, CA 90067

United States

(310) 228.3700

Get Directions

Palo Alto, CA

379 Lytton Avenue

Palo Alto, CA 94301

United States

(650) 815.2600

Get Directions

San Diego, CA

501 West Broadway, 19th Floor

San Diego, CA 92101

United States

(619) 338.6500

Get Directions

San Diego, CA

12275 El Camino Real, Suite 200

San Diego, CA 92130

United States

(858) 720.8900

Get Directions

San Francisco, CA

Four Embarcadero Center, 17th Floor

San Francisco, CA 94111

United States

(415) 434.9100

Get Directions

District of Columbia

District of Columbia

Washington, DC

2099 Pennsylvania Avenue, NW, Suite 100

Washington, DC 20006-6801

United States

(202) 747.1900

Get Directions

Illinois

Illinois

Chicago, IL

Three First National Plaza, 48th Floor

70 West Madison Street

Chicago, IL 60602

United States

(312) 499.6300

Get Directions

New York

New York

New York, NY

30 Rockefeller Plaza

New York, NY 10112

United States

(212) 653.8700

Get Directions

Texas

Texas

Dallas, TX

2200 Ross Avenue, 24th Floor

Dallas, TX 75201

United States

(469) 391.7400

Get Directions

 
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
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
  • Subscribe
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

© 2010-2021 Best Lawyers — All Rights Reserved.

BL Icon

LEGAL INSIGHTS

by Best Lawyers®



Get the latest insights on the news, trends, and people that shape the global legal field with our weekly email digest.

Please enter a valid email address.

You have already subscribed.





PRIVACY POLICY

Thank you for subscribing.