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I am a workers’ compensation and serious injury attorney with over 35 years of experience advocating for injured individuals in Missouri and Illinois. Before becoming an attorney, I was a Registered Nurse — and that medical foundation continues to shape how I practice law today.
My career began representing insurance companies and employers. That experience gave me an inside understanding of how claims are evaluated, defended, and often minimized. Today, I use that knowledge to advocate exclusively for injured workers and accident victims.
As a nurse-turned-lawyer, I approach every case with both clinical insight and legal precision. I understand medical records, impairment ratings, causation issues, and the long-term impact injuries have on a person’s ability to work and live fully. This dual background allows me to identify strengths in a case that others may overlook.
My practice focuses primarily on:
• Missouri and Illinois Workers’ Compensation
• Permanent Total Disability claims
• Complex and medically intensive cases
• Serious personal injury matters
I lead a focused, all-female firm committed to compassionate, highly strategic representation. My clients are never treated as files or numbers. Injury cases are deeply personal — they affect income, identity, family stability, and peace of mind. I take that responsibility seriously.
I believe strong advocacy requires both strength and empathy. As a nurse, I cared for patients. As an attorney, I fight for them.
3
Practice Areas
35 years | 25,000 cases
35 years | 5,000 cases
35 years | 200 cases
Free Consultation
$0 first 15 minutes
25%-35%
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Chat withState: Colorado
Acquired: 2003
No misconduct found
State: Illinois
Acquired: 1992
No misconduct found
State: Missouri
Acquired: 1991
No misconduct found
425 North New Ballas Road, Saint Louis, MO, 63141
24 Client Reviews
Showing 11 - 12 of 12 reviews | Practice Area Knowledge
Posted by Bill | January 25, 2012 | Car Accidents
Excellent Lawyer for Auto Accident Case
Cynthia Hennessey handled my daughter’s car accident case. I was very nervous hiring a lawyer for her as she is only 18. I knew she needed a lawyer and would not be treated fairly by the insurance company. I admit I liked that Cynthia is a nurse and a woman. I thought she would be more understandin...
Posted by Jim | January 23, 2012 | Workers Compensation
Very Nice Attorney
My husband and I hired Cynthia Hennessey to handle my accident case. She was highly recommended by another patient sitting in the waiting room at my doctor’s office. I had both a Workmens Comp case and a Personal Injury case because my truck was hit by another truck while I was on the job. Cynthia...
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2019
Client Champion Award, Martindale-Hubbell
1997 - Present
Attorney, Hennessy Law firm, LLC
1990 - 1997
Attorney, Evans & Dixon, LLC
Member
Member
Member
Permanent Total Disability Award Secured – Lifetime Benefits Granted (ALJ Reversed)
1991
JD - Juris Doctor
1985
BA - Bachelor of Arts
N/A
Missouri and Illinois Workers' Compensation
2026
2025
2025
2025
English