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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 1 - 3 of 3 reviews | Car Accidents
Posted by Sherri | February 13, 2012 | Car Accidents
Great Experience
I always hoped I would never need a personal injury lawyer. The commercials on television are so sleazy, I thought they were all “ambulance chasersâ€. Well, then my car was rear-ended by a pick up truck going 55 miles an hour while I was at a dead stop. I happened to be on the job, as I am a Sa...
Posted by Dorothy | February 02, 2012 | Car Accidents
Highly Recommend
Cynthia Hennessey represented my husband Jim with his car accident case. He was rear-ended by a pickup truck going 55 miles an hour. He needed neck surgery and missed almost 6 months of work. I was very lucky to find Cynthia. She promised she was fast with cases, that she didn’t just let them sit ...
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...
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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