Atty. Derek Ruzicka
Derek P. Ruzicka focuses his trial practice in a diverse range of areas, with an emphasis in complex litigation.
Litigation - Construction & More Attorney · Serving St. Louis, MO · 18+ Years Experience
Profile Summary
About Derek Ruzicka at a Glance
Derek Ruzicka is a class action, construction, product liability, and insurance attorney based in St. Louis, Missouri, practicing at Gausnell, O'Keefe & Thomas LLC. They have 18+ years of legal experience, licensed to practice since 2008. Admitted to practice in Missouri (2008) and Illinois (2009). Educated at Southern Illinois University (JD, 2008) and Valparaiso University (—, 2004). Recognitions include Best Lawyers in America — Litigation - Construction (2026), Best Lawyers in America — Litigation - Insurance (2026), and Best Lawyers in America — Mass Tort Litigation / Class Actions - Defendants (2026). Serves clients in St. Louis, MO and the surrounding metropolitan area.
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About Derek Ruzicka
- Derek P. Ruzicka focuses his trial practice in a diverse range of areas, with an emphasis in complex litigation
- He has handled cases in a number of difficult venues, from the City of St. Louis, Missouri, to Madison and St. Clair Counties, in Illinois, and Federal Court in East St. Louis and St. Louis
- Whether through dismissal, favorable trial verdicts, or reasonable case resolutions, he has successfully handled many difficult matters through completion
- Derek’s experience is extensive, having handled cases involving general liability matters, professional liability, toxic torts, including asbestos, benzene and other substances, product liability, trucking, and environmental claims
- He has represented product manufacturers of consumer products, power tools, industrial vehicles, manufactured housing, foundry equipment, and a host of others, including pharmaceutical litigation
- Derek also devotes his practice to trial work for design professionals or other construction professionals, product liability, and other complex litigation matters
- He has arbitrated or tried successfully claims involving architects, engineers, contractors, subcontractors, and owners
- He also assists design professionals and small business owners in up-front contract document reviews and consultations
Practice Areas Explained
Derek Ruzicka's Areas of Legal Practice
Each practice area below reflects the types of cases Derek Ruzicka handles, with a practical overview of what that area of law involves and how it may apply to your situation in St. Louis.
Class Action in St. Louis
Derek Ruzicka is one of 26,226 class action attorneys indexed nationally. Browse class action attorneys in Missouri →
Construction Law in St. Louis
Derek Ruzicka is one of 40,302 construction attorneys indexed nationally. Browse construction attorneys in Missouri →
Product Liability in St. Louis
Derek Ruzicka is one of 65,610 product liability attorneys indexed nationally. Browse product liability attorneys in Missouri →
Insurance Law in St. Louis
Insurance attorneys for coverage disputes, bad faith claims, denied claims, and policy disputes.
Derek Ruzicka is one of 120,903 insurance attorneys indexed nationally. Browse insurance attorneys in Missouri →
Jurisdictional Context
Why Local Counsel Matters in St. Louis
Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Louis are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Missouri courts without local counsel or pro hac vice admission.
St. Louis Courts and Legal Process
Choosing a St. Louis-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional Missouri attorneys? Browse all attorneys in St. Louis or all attorneys in Missouri.
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Professional Profile
Why Clients in St. Louis Choose Derek Ruzicka
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Derek Ruzicka's practice in the field of class action, construction, product liability, and insurance.
Decade-Tested Legal Experience
Derek Ruzicka brings 18+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in Missouri and Illinois, Derek Ruzicka can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering class action, construction, and product liability, Derek Ruzicka can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in St. Louis
A St. Louis-based practice means Derek Ruzicka attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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Derek Ruzicka's Practice Areas & Specializations
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