Atty. W. Patrick Sullivan
Pat Sullivan represents professional healthcare providers, including doctors, dentists, nurses, nursing homes, and other long-term care facilities in malpractice claims and in matters pending before professional licensing boards. His experience includes successful jury trials in numerous counties throughout Wisconsin and in Federal Court, as well as hearings representing healthcare professionals before the Wisconsin Department of Safety and Professional Services.
Dental Malpractice Defense & More Attorney · Serving Mequon, WI · 42+ Years Experience
Profile Summary
About W. Patrick Sullivan at a Glance
W. Patrick Sullivan is a Founding Partner based in Mequon, Wisconsin, practicing at Siesennop & Sullivan LLP. They have 42+ years of legal experience, licensed to practice since 1984. Their practice focuses on medical malpractice, employment, real estate, ip, and elder law. Admitted to practice in Wisconsin (1984), U.S. District Court, Eastern District of Wisconsin (1984), U.S. District Court, Western District of Wisconsin (1984), and U.S. Supreme Court Illinois (1998). Educated at Marquette University (J.D., 1984) and Columbia University (M.A. Tufts, 1977). Recognitions include AV Preeminent. Serves clients in Mequon, WI and the surrounding metropolitan area.
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About W. Patrick Sullivan
- Pat Sullivan represents professional healthcare providers, including doctors, dentists, nurses, nursing homes, and other long-term care facilities in malpractice claims and in matters pending before professional licensing boards
- His experience includes successful jury trials in numerous counties throughout Wisconsin and in Federal Court, as well as hearings representing healthcare professionals before the Wisconsin Department of Safety and Professional Services
- Recent Published Decisions • Estate of John King v
- Kramer, et al., 680 F.3d 1013 (7th Cir. 2012) • Stinson v
- City of Milwaukee, et al., 799 F.3d 833 (7th Cir. 2015) Petition for rehearing en banc granted
- Awards and Recognitions • St. Thomas More Scholar • Member, Marquette University National Moot Court Team • Wisconsin Super Lawyers (2006 and 2007) • Leader in the Law (2016) • AV® Preeminent™ Peer Review Rated by Martindale-Hubbell® • Best Lawyers in America 2015 and 2016 • Best Lawyers “Lawyer of the Year” 2019 • Member, American Board of Trial Advocates Associations and Memberships • State Bar Association of Wisconsin • American Bar Association • Civil Trial Counsel of Wisconsin • Defense Research Institute • Wisconsin Healthcare Association • Wisconsin Center for Assisted Living • Wisconsin Assisted Living Association
Practice Areas Explained
W. Patrick Sullivan's Areas of Legal Practice
Each practice area below reflects the types of cases W. Patrick Sullivan handles, with a practical overview of what that area of law involves and how it may apply to your situation in Mequon.
Medical Malpractice in Mequon
Medical malpractice lawyers represent patients harmed by negligent doctors, hospitals, and other providers. Free case review, no fee unless you win.
W. Patrick Sullivan is one of 48,593 medical malpractice attorneys indexed nationally. Browse medical malpractice attorneys in Wisconsin →
Employment Law in Mequon
Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.
W. Patrick Sullivan is one of 167,770 employment attorneys indexed nationally. Browse employment attorneys in Wisconsin →
Real Estate Law in Mequon
Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.
W. Patrick Sullivan is one of 313,729 real estate attorneys indexed nationally. Browse real estate attorneys in Wisconsin →
Intellectual Property in Mequon
IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.
W. Patrick Sullivan is one of 105,285 ip attorneys indexed nationally. Browse ip attorneys in Wisconsin →
Elder Law in Mequon
Elder law attorneys for Medicaid planning, long-term care, guardianship, conservatorship, and elder abuse.
W. Patrick Sullivan is one of 52,999 elder law attorneys indexed nationally. Browse elder law attorneys in Wisconsin →
Jurisdictional Context
Why Local Counsel Matters in Mequon
Practicing law in Wisconsin. Legal matters in Wisconsin are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Mequon are typically filed in the local municipal court or the appropriate Wisconsin state district court, depending on subject matter and amount in controversy. An attorney licensed in Wisconsin 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 Wisconsin courts without local counsel or pro hac vice admission.
Mequon Courts and Legal Process
Choosing a Mequon-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 Wisconsin attorneys? Browse all attorneys in Mequon or all attorneys in Wisconsin.
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Professional Profile
Why Clients in Mequon Choose W. Patrick Sullivan
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 W. Patrick Sullivan's practice in the field of medical malpractice, employment, real estate, ip, and elder law.
Decade-Tested Legal Experience
W. Patrick Sullivan brings 42+ 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 Wisconsin, U.S. District Court, Eastern District of Wisconsin, and U.S. District Court, Western District of Wisconsin, W. Patrick Sullivan can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering medical malpractice, employment, and real estate, W. Patrick Sullivan can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Mequon
A Mequon-based practice means W. Patrick Sullivan 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 W. Patrick Sullivan Handles in Mequon
Below is a representative sample of the types of matters W. Patrick Sullivan has experience with under Wisconsin 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 W. Patrick Sullivan directly to discuss the specifics of your situation.
Search Reference
How People Find W. Patrick Sullivan Online
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W. Patrick Sullivan's Practice Areas & Specializations
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