• Marguerita Brunson Sims
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Marguerita Brunson Sims

Marguerita Brunson Sims

Of Counsel


Marguerita Sims represents health care industry clients, drawing on more than 20 years of in-house, government, and private practice experience. In addition, she has handled a wide range of compliance and fraud and abuse issues. Her practice is informed by her firsthand knowledge of the way leading companies operate and set business priorities.

Prior to joining Carlton Fields, Marguerita was senior corporate counsel for WellCare Health Plans Inc. In that role, she provided legal advice regarding complex health care arrangements between the managed care health plan and various providers and other organizations, and helped the company navigate the national legal and regulatory landscape. Previously, Marguerita was general counsel, corporate secretary, and chief compliance officer for FirstCare Health Plans, a Texas-based health insurance (managed care) company.

Additionally, Marguerita worked as compliance counsel for LabCorp, a Fortune 500 clinical laboratory company, where she helped monitor both federal and state compliance activity nationwide. She also worked for international law firms in Washington, D.C., North Carolina, and Texas, where she represented pharmaceutical companies, hospital systems, medical device manufacturers, and various other health care entities. After graduating from law school, Marguerita worked in Washington, D.C., with the Centers for Medicare and Medicaid Services (CMS) as a fraud and abuse attorney, and returned to the Washington, D.C., area to work at the U.S. Food and Drug Administration (FDA) as a regulatory counsel within the Center for Drug Evaluation and Research (CDER).

Admitted in Connecticut and District of Columbia. (Until admission in Florida, any work on Florida matters supervised in accord with Rule 4-5.3)

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Professional & Community Involvement

  • District of Columbia Bar
  • Connecticut Bar Association
  • Association of Corporate Counsel
  • American Bar Association
  • American Health Lawyers Association
  • Georgetown University
    • African American Advisory Board (2017-present)
    • Alumni, Admissions Program (2001-2005, 2012-present)
  • Jack & Jill of America Inc.
    • Leadership Board (2009-present)
  • Bar Association of the District of Columbia 
    • Steering Committee (2000)
  • Morgan, Lewis & Bockius
    • Associates’ Committee (1999-2000)


  • University of Pennsylvania Law School (J.D., 1994)
  • Georgetown University (A.B., 1990)
  • University of Texas School of Law (Certified Mediator, 2010)
Bar Admissions
  • Connecticut
  • District of Columbia
  • Hon. John H. Suda, District of Columbia Superior Court


  • Senior Corporate Counsel, WellCare Health Plans, Tampa, FL (2013-2018)
  • Of Counsel, K&L Gates, Austin, TX (2004-2005)
  • Vice President - General Counsel, Chief Compliance Officer and Corporate Secretary, FirstCare Health Plans, Austin, TX (2007-2010)
  • Regulatory Counsel, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Rockville, MD (2005-2007)
  • Corporate Compliance Counsel, LabCorp, Burlington, NC (2001-2004)
  • Associate, Morgan, Lewis & Bockius, Washington (1998-2000)
  • Staff Attorney, Centers for Medicare and Medicaid Services, Office of the General Counsel, U.S. Department of Health and Human Services, Baltimore (1997–1998)


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