Free Consultation
$0 first 15 minutes
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%
Quickly connect with top attorneys through our legal directory to get help with your legal issue.
Chat with a live agent who can match you with the right attorney for your legal needs.
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 5 reviews | General Knowledge
Posted by David | February 23, 2026 | Hired Attorney | Workers Compensation
Accomplished and Caring Attorney
Cynthia Hennessey successfully represented me “long distance” with a workmen’s compensation claim several years ago after I suffered a traumatic brain injury from a fall while at work. I give her my highest recommendation. She is a caring, knowledgeable, accomplished and very successful attorney. ...
Posted by beth | February 08, 2012 | Workers Compensation
Highly recommend for brain injury
My husband worked for a very large company, (I can’t say who) that delivers packages worldwide. He fell off a loading dock 2 years ago, onto his back and head. He suffered an injury to his head and brain and has never returned to work and will never return to work. He has never been the same since...
Posted by suzzy | February 06, 2012 | Workers Compensation
Very Good experience
My husband had a fall at work injuring his neck and back. We knew it was a serious injury, and that we better get a lawyer to represent us. We had no idea where to turn. I opened up the paper and saw an advertisement for Cynthia Hennessey’s Workers Comp 101 the workshop. We cleared our calendar and...
Posted by Christine | February 06, 2012 | Workers Compensation
Very Smooth Experience
I had a great experience with Cynthia Hennessey and her office. I fell at work and broke my ankle in three places requiring surgery with plates and screws. My recovery was long and drawn out. Cynthia was always great with keeping me posted as to what was happening with my case. I liked that she han...
Posted by fred | January 29, 2012 | Workers Compensation
Very Good Experience
I went to Cynthia’s Workers’ Comp. 101 workshop in Collinsville because the lawyer I had wasn’t doing anything on my case. I learned more that evening than I ever thought possible. I fired my lawyer the next day and hired Cynthia. Cynthia had my case filed and ready for trial in 6 months. My ...
No Endorsement Data Available Yet
This attorney hasn't received any attorney endorsements recently on Avvo.
No Endorsement Data Available Yet
This attorney hasn't created any attorney endorsements recently on Avvo.
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