Mike is a founding member of O’Leary, Shelton, Corrigan, Peterson, Dalton & Quillin. Mike represents plaintiffs suffering from serious or catastrophic injuries in a wide range of cases, including those involving dangerous or defective pharmaceuticals, medical device failures, serious motor vehicle collisions and dangerous conditions of property. Mike is admitted to practice law in the states of Missouri and Illinois, and he accepts cases from all over the country.

Mike has extensive experience litigating pharmaceutical and medical device cases. In fact, he has represented thousands of clients in such litigations, including those involving Yaz/Yasmin, Hormone Replacement Therapy (HRT), Actos, Pradaxa, Granuflo, DePuy metal-on-metal hips, Roundup, Transvaginal Mesh (TVM), Testosterone Replacement Therapy (TRT), IVC Filters, and many others. Mike has overseen the resolution of millions of dollars in settlements for those injured by defective products.

Mike was born and raised in St. Louis, attended St. Louis University High School, and earned his undergraduate degree from John Carroll University and his Juris Doctor degree from the University of Missouri School and of Law.

Mike also has a Master’s degree in Management in Information Systems (MIS) at the University of Missouri-St. Louis, and prior to attending law school, Mike was a Software Engineer, developing structural engineering software for the building components industry.

Mike is the son of the late St. Louis County, Missouri State Court Judge, Dennis Quillin. Mike currently lives in St. Louis with his wife and son.

Licensed to practice law in Missouri
Licensed to practice law in Illinois
Missouri Bar Association
Missouri Association of Trial Attorneys

Mike has handled thousands of claims in complex mass tort litigation, securing millions of dollars in verdicts and settlements for his clients.

$21,000,000 – Biomet metal-on-metal hip jury verdict in November of 2020.

Mike has participated in numerous complex Mass Tort Litigations resulting in millions of dollars in verdicts settlements:
Roundup
IVC Filters
Biomet metal-on-metal hips
Testosterone Replacement Therapy (TRT)
Yaz/YasminHormone Replacement Therapy (HRT)
Actos
Pradaxa
Granuflo
DePuy metal-on-metal hips
Transvaginal Mesh (TVM)
Zimmer NexGen Knees
Mirena IUD
Lipitor
Syngenta Corn Litigation
General Motors Ignition Defect Litigation
Invokana

Mike was selected to the list of “The Best Lawyers in America.” Recognition by Best Lawyers is based on peer review.

Mike is also featured on the “Super Lawyers” list (awarded to less than 5% of attorneys).

Mike has been selected as a “Rising Star” in the Top Attorneys of Missouri & Kansas.

Mike was the Managing Editor of the Missouri Environmental Law and Policy Review, where he had a work published:
Fueling Debate: The Ninth Circuit’s Order to Reevaluate Fuel Efficiency Standards for Lightweight Trucks, 16 Mo. Envtl. L. & Pol’y Rev. 223.