News
UB Greensfelder Attorneys and Firm Earn Recognition in Legal 500 2026 U.S. City Elite Rankings
July 21, 2026
Cassie Barr counsels clients on corporate and tax law matters. In the area of corporate law, Cassie has an emphasis in mergers and acquisitions and has experience in providing counsel to middle market companies in a broad range of industries, including health care, technology, construction, manufacturing and distribution.
In the area of tax law, Cassie counsels clients on corporate and business tax planning. She also has experience in tax controversy matters and has represented clients before the Internal Revenue Service and state taxing authorities.
Before joining the firm, Cassie worked as an international tax associate for a big four professional services firm. Her background includes degrees in business and accounting.
- Saint Louis University School of Law (J.D., 2011)
- Concentrations in Business Transactions
- Taxation
- Southern Illinois University Edwardsville (M.B.A., 2008)
- Southern Illinois University Edwardsville (B.S., cum laude, 2007)
- Accounting
- Missouri
- Illinois
- U.S. Tax Court
- Bar Association of Metropolitan St. Louis
- American Bar Association
- Member, Governing Board
- Named to The Best Lawyers in America®, Business Organizations (including LLCs and Partnerships); Tax Law (2023-2026)
- Named to The Legal 500 US Elite, Missouri, Corporate and M&A (2025)
- Named Best Lawyers® Business Organizations (including LLCs and Partnerships) “Lawyer of the Year” in St. Louis (2025)
- Named to Best Lawyers: Ones to Watch® in America (2021-2022)