Attorneys of Onder Law - St. Louis Personal Injury Attorneys
Cathleen DeWitt - St. Louis Personal Injury Lawyer

Cathleen DeWitt

Pharmaceutical & Medical Products Litigation

Email Address:DeWitt@onderlaw.com

Cathleen was born in Columbia, Missouri and was raised in Sikeston, Missouri. She attended the University of Miami (FL) where she earned her Bachelor of Business Administration with an emphasis in Accounting and Legal Studies. While at the University of Miami, she was a member of the Honors Program and graduated cum laude.

Upon graduating from the University of Miami, Cathleen attended the University of Missouri School of Law in Columbia, Missouri where she obtained her J.D. During law school, she held numerous leadership positions in the school's premiere legal organizations. Cathleen was also awarded the CALI Excellence for the Future Award for excellent achievement in the study of Elder Law.

While in law school, Cathleen attended the Institute on World Legal Problems in Innsbruck, Austria where she studied under United States Supreme Court Judge Antonin Scalia. She gained additional legal experience by working in the Office of Chief Counsel in St. Louis, Missouri while in school.

Since joining Onder, Shelton, O'Leary & Peterson, LLC in 2010, Cathleen has represented several hundred injured parties across the country who have been injured by pharmaceutical companies and medical device manufacturers. Her practice not only includes a high concentration of product liability litigation, but all personal injury litigation including auto accidents, workplace accidents, medical malpractice and trucking accidents.

Cathleen was admitted to the Missouri Bar in 2010 and is a member of the Missouri Bar and the Bar Association of Metropolitan St. Louis.

Cathleen lives in St. Louis with her husband who is also an attorney.

Free Case Review


Onder Law holds the highest possible peer review rating from Martindale-Hubbell

Onder Law holds the highest possible peer review rating from Martindale-Hubbell

Million Dollar Advocates Forum

We have been recognized by the Million Dollar Advocates Foum for securing million dollar settlements on behalf of our clients. Fewer than 1% of all attorneys receive this recgonition.

Multi-Million Dollar Advocates Forum

We have been recognized by the Million Dollar Advocates Foum for securing multi-million dollar settlements on behalf of our clients. Fewer than 1% of all attorneys receive this recgonition.

Super Lawyers

The attorneys of Onder Law have been recognized as Super Lawyers

Multi-Million Dollar Advocates Forum

We have been nominated as one of the Best Attorneys in America - The Most Qualified Attorneys in Our Country by Rue Ratings

Member National Trial Lawyers Association

The attorneys of Onder Law are proud members of the National Trial Lawyers Association


Onder Law handles mass tort claims that are filed in federal courts nationwide. Attorneys at Onder Law are licensed only in Missouri, Illinois and Kansas; however our attorneys have handled cases nationwide* including in: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming.

Attorneys at Onder Law have represented clients in federal multi-district litigation in the following cities*: Atlanta, GA, Austin, TX, Baltimore, MD, Birmingham, AL, Boston, MA, Buffalo, NY, Charlotte, NC, Chicago, IL, Cincinnati, OH, Cleveland, OH, Columbus, OH, Dallas, TX, Denver, CO, Detroit, MI, Fresno, CA, Hartford, CT, Honolulu, HI, Houston, TX, Indianapolis, IN, Jacksonville, FL, Kansas City, MO, Las Vegas, NV, Los Angeles, CA, Louisville, KY, Memphis, TN, Miami, FL, Milwaukee, WI, Minneapolis, MN, Nashville, TN, New Orleans, LA, New York, NY, Oklahoma City, OK, Orlando, FL, Philadelphia, PA, Phoenix, AZ, Pittsburgh, PA, Portland, OR, Providence, RI, Raleigh, NC, Richmond, VA, Riverside, CA, Rochester, NY, Sacramento, CA, Salt Lake City, UT, San Antonio, TX, San Diego, CA San Francisco, CA, San Jose, CA, Seattle, WA, St. Louis, MO, Tampa, FL, Tucson, AZ, Tulsa, OK, Virginia Beach, VA and Washington, DC.

* In order to represent clients in states where the attorneys are not licensed, they must be granted admission pro hac vice or associate with local counsel.