Atty. William Daniel Kellen

Atty. William Daniel Kellen

William Daniel Kellen is a lawyer practicing speeding & traffic ticket, criminal defense, dui & dwi and 2 other areas of law. William has been licensed for 17 years.

Denver Denver 17 yrs experience 17 year
Call (303) 962-7728 Book Appointment

Profile Summary

About William Daniel Kellen at a glance

William Daniel Kellen is a dui/dwi, criminal defense, business, traffic, and litigation attorney based in Denver, Colorado. They have 17+ years of legal experience, licensed to practice since 2009. Admitted to practice in Illinois (2009) and Colorado (2010). Educated at DePaul University College of Law (J.D., 2009). Serands clients in Denver, CO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Daniel Kellen is a lawyer practicing speeding & traffic ticket, criminal defense, dui & dwi and 2 other areas of law
  • William has been licensed for 17 years
  • William practices in Denver, CO

Practice Areas Explained

William Daniel Kellen's Areas of Practice

Each practice area below reflects the types of cases William Daniel Kellen handles, with a brief overview of what that area of law covers.

DUI / DWI Defense

Find experienced DUI and DWI defense attorneys near you. Compare verified profiles, read client reviews, and consult about your case for free.

William Daniel Kellen is one of 29,976 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Colorado →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

William Daniel Kellen is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Colorado →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

William Daniel Kellen is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Colorado →

Traffic Violations

William Daniel Kellen is one of 14,506 traffic attorneys indexed nationally. Browse traffic attorneys in Colorado →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

William Daniel Kellen is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Colorado →

Jurisdictional Context

Why local counsel matters in Colorado

Practicing law in Colorado. Legal matters in Colorado are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Denver are typically filed in the local municipal court or the appropriate Colorado state district court, depending on subject matter and amount in controversy. An attorney licensed in Colorado brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Colorado courts without local counsel or pro hac vice admission.

Looking for additional Colorado attorneys? Browse all attorneys in Denver or all attorneys in Colorado.

Frequently Asked

Common questions about William Daniel Kellen

Where is William Daniel Kellen's law office located?
William Daniel Kellen's law practice is located in Denver, Colorado. You can contact the office directly through this profile page.
What practice areas does William Daniel Kellen handle?
William Daniel Kellen focuses on dui/dwi, criminal defense, business, traffic, litigation. Each practice area listed reflects experience handling cases of that type in Colorado.
How long has William Daniel Kellen practiced law?
William Daniel Kellen has 17+ years of legal experience and has been licensed since 2009.
Where did William Daniel Kellen go to law school?
William Daniel Kellen earned their education at (J.D., 2009).
How can I contact William Daniel Kellen for a consultation?
You can contact William Daniel Kellen directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
DePaul University College of Law
- 2009

Bar Admissions

Illinois
Admitted: 2009
Colorado
Admitted: 2010

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