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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 - 5 of 6 reviews | Lawsuits & Disputes
Posted by Laurie | July 30, 2021 | Hired Attorney | Lawsuits & Disputes
Laurie
I was very pleased with the settlement I received using The Hennessey Law Firm. Stephanie, whom was the contact person I dealt with, was very helpful and knowledgeable. Since I had never been involved in any type of lawsuit before, she guided me through the process step by step. She kept in contact ...
Posted by Howard | March 11, 2012 | Lawsuits & Disputes
Very Good Experience
Cynthia was truly an angel to me when I needed it the most. After having 2 other lawyers take my case and do nothing for 5 years, I prayed to find an honest lawyer who would take it and work it and finally get me justice. Cynthia handled my case, worked very hard and I am very grateful.
Posted by Robbie | February 24, 2012 | Lawsuits & Disputes
Very Nice Lawyer
Cynthia was very, very nice to me and my husband. I hurt my back and I first hired a law firm off of the TV commercials. It was terrible. All I ever got to talk to was a secretary, and couldn’t get anyone to answer my questions. I never even met the lawyer, and I felt like no one was fighting for m...
Posted by Dorothy | February 02, 2012 | Lawsuits & Disputes
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 Julie | February 02, 2012 | Lawsuits & Disputes
Great Experience
I never in a million years thought I would need a lawyer for a Workers Comp injury. I am a pharmaceutical sales rep and I fell down 5 stairs while carrying a load of work materials, I hurt my neck and couldn’t work. Workers Comp tried to deny this at first. It was then that I knew I needed a lawye...
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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