Alternate Office(s)
Areas of Practice
Practice-Specific Experience
  • The University of Chicago Law School, J.D., 1990, with honors; Order of the Coif; University of Chicago Law Review
  • Georgetown University, B.A., 1985, magna cum laude; Phi Beta Kappa; Baker Scholarship; Foley Medal
Bar Admissions
  • Louisiana, 1990
Dionne Rousseau
Four United Plaza
8555 United Plaza Blvd
Baton Rouge, LA 70809
225.248.2026 tel
504.582.‎8191 tel
225.248.3026 fax

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Mergers & Acquisitions Practice


  • Recognized by "Chambers USA – America’s Leading Lawyers for Business" in the area of Corporate/M&A (listed annually since 2005)
  • Listed in the 2013 BTI Client Service All-Stars
  • Listed in The Best Lawyers in America® 2019 (Copyright 2018 by Woodward/White, Inc., Aiken, SC) in the areas of Corporate Law and Securities/Capital Markets Law (listed annually since 1999)
  • Recognized by Best Lawyers® as the 2018 Corporate Law "Lawyer of the Year" in Baton Rouge
  • Named by Profiles in Diversity Journal as 2017 "Women Worth Watching"
  • Listed in the 2018 edition of Louisiana Super Lawyers in the area of Securities & Corporate Finance (also listed in 2007-2008, 2013 to present)
  • Featured in "Executive Spotlight" in the Baton Rouge Business Report in 2012 
  • AV Preeminent® Peer Review Rating in Martindale-Hubbell
  • Selected by New Orleans CityBusiness as one of the leading 50 attorneys in New Orleans in 2005 and 2007, and as one of New Orleans CityBusiness' 2003 Women of the Year




  • "The Division of Corporation Finance of the SEC Issues Further Guidance Concerning Shareholder Proposals"
    November 2017
  • "SEC Proposes Amendments to Disclosure Rules and Forms"
    October 2017


  • City Year Baton Rouge Advisory Board of Directors (Board Member, 2015 to date); Gala Host Committee Chair (2017)  
  • Louisiana Policy Institute for Children (Board of Directors, 2017 to date)
  • American Bar Association
  • Association for Corporate Growth
  • Big Brothers Big Sisters of Southeast Louisiana (Big Sister)
  • Bureau of Governmental Research (Treasurer, Secretary, and Executive Committee Member, 2001–2003; Board Member, 1998–2003)
  • Junior Achievement of Greater New Orleans, Inc. (Board Member, 2003–2007)
  • Louisiana State Bar Association