Atty. Mark Lenihan
Mark Lenihan is a lawyer practicing business law, general practice, judges & courts and 3 other areas of law. Mark has been licensed for 13 years.
Business Law & More Attorney · Serving St. Louis, MO · 13+ Years Experience
Profile Summary
About Mark Lenihan at a Glance
Mark Lenihan is a business and litigation attorney based in St. Louis, Missouri. They have 13+ years of legal experience, licensed to practice since 2013. Admitted to practice in Illinois (2013) and Tennessee (2017). Educated at DePaul University (J.D., 2013). Serves clients in St. Louis, MO and the surrounding metropolitan area.
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About Mark Lenihan
- Mark Lenihan is a lawyer practicing business law, general practice, judges & courts and 3 other areas of law
- Mark has been licensed for 13 years
- Mark practices in St. Louis, MO
Practice Areas Explained
Mark Lenihan's Areas of Legal Practice
Each practice area below reflects the types of cases Mark Lenihan handles, with a practical overview of what that area of law involves and how it may apply to your situation in St. Louis.
Business & Corporate Law in St. Louis
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Mark Lenihan is one of 497,491 business attorneys indexed nationally. Browse business attorneys in Missouri →
Civil Litigation in St. Louis
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Mark Lenihan is one of 450,751 litigation attorneys indexed nationally. Browse litigation 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.
Frequently Asked
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Professional Profile
Why Clients in St. Louis Choose Mark Lenihan
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 Mark Lenihan's practice in the field of business and litigation.
Decade-Tested Legal Experience
Mark Lenihan brings 13+ 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 Illinois and Tennessee, Mark Lenihan can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering business and litigation, Mark Lenihan 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 Mark Lenihan attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Mark Lenihan Handles in St. Louis
Below is a representative sample of the types of matters Mark Lenihan has experience with under Missouri law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Mark Lenihan directly to discuss the specifics of your situation.
Search Reference
How People Find Mark Lenihan Online
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Mark Lenihan's Practice Areas & Specializations
Education & Law School Background
Bar Admissions & Licensed Jurisdictions
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