Wisconsin DUI & OWI Defense Attorney

Attorney Nathan J.Dineen

Focused legal representation built on courtroom experience, scientific training, and a detailed understanding of Wisconsin impaired-driving cases.

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Meet Your Advocate

Focused on DUI & OWI Defense

Nathan J. Dineen represents clients in DUI, OWI, and related criminal-defense matters throughout Wisconsin. His work combines courtroom advocacy with training in field sobriety testing, drug-recognition evaluation, and the science behind chemical testing.

He has presented to other lawyers on DUI defense topics and has been recognized by legal organizations for trial advocacy, professional achievement, and impaired-driving defense.

Trial PreparationScientific EvidenceOWI DefenseWisconsin Courts

Professional Recognition

Credentials & Distinctions

2026 Super Lawyer11x Super Lawyers designation

Top 100 Trial LawyerThe National Trial Lawyers

10/10 Avvo RatingSuperb attorney rating

Forensic Lawyer-ScientistAmerican Chemical Society training and proficiency testing

SFST & DRE TrainingInstructor-level training relevant to impaired-driving investigations

DUI Defense OrganizationsDUIDLA, NCDD, and Wisconsin criminal-defense associations

Scientific Training

What Is a Forensic Lawyer-Scientist?

The designation is associated with advanced coursework and proficiency testing involving forensic chromatography, drug analysis, and biological-fluid testing. The practical goal is to understand how blood and breath evidence is produced, tested, interpreted, and challenged.

Science and instrumentation behind blood testing
Drug-analysis methods used in forensic laboratories
Biological-fluid analysis in drug-impaired-driving cases
Quality control, reliability, and interpretation of results

Career Highlights

Experience Applied to the Defense

2026

Named a 2026 Super Lawyer

Part of 11 Super Lawyers designations.

2016

DUIDLA Seminar Speaker

Presented on voir dire and cross-examination of laboratory analysts in drug-impaired-driving cases.

2014

Forensic Lawyer-Scientist Designation

Completed advanced scientific training related to chemical testing.

2013

Up & Coming Attorney Recognition

Recognized by the Wisconsin Law Journal.

Common Questions

Attorney Nathan J. Dineen FAQs

Every case depends on its own facts. A consultation can help clarify the next step.

His practice focuses on DUI, OWI, chemical-testing issues, license matters, and related criminal-defense cases.

Blood and breath evidence is produced through technical procedures. Understanding the science can help identify reliability, collection, testing, and interpretation issues.

He represents clients in communities throughout Wisconsin, subject to case review and availability.

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