Atty. William David Day

Atty. William David Day

William David Day is a lawyer practicing criminal, estates & trust law, government and 4 other areas of law. William received a B.S. degree from United States Naval Academy in 1995, and has been licensed for 21 years.

Rockville Rockville 21 yrs experience 21 year
Call (240) 885-7850 Book Appointment

Profile Summary

About William David Day at a glance

William David Day is an Associate based in Rockville, Maryland, practicing at Gill Sippel And Gallagher. They have 21+ years of legal experience, licensed to practice since 2005. Their practice focuses on dui/dwi, trusts, criminal defense, litigation, and government. Admitted to practice in Maryland (2005), District of Columbia (2006), and Florida (2012). Educated at Columbus School of Law at Catholic University (J.D., 2005) and United States Naval Academy (B.S., 1995). Active member of District of Columbia Bar Maryland State Bar Association, Inc and American Bar Association (Member, Intellectual Property Law Section) American Intellectual Property Law Association. Serands clients in Rockville, MD and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William David Day is a lawyer practicing criminal, estates & trust law, government and 4 other areas of law
  • William received a B.S. degree from United States Naval Academy in 1995, and has been licensed for 21 years
  • William practices at Gill Sippel & Gallagher in Rockville, MD

Practice Areas Explained

William David Day's Areas of Practice

Each practice area below reflects the types of cases William David Day 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 David Day is one of 29,976 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Maryland →

Trusts

William David Day is one of 104,171 trusts attorneys indexed nationally. Browse trusts attorneys in Maryland →

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 David Day is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Maryland →

Civil Litigation

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

William David Day is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Maryland →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

William David Day is one of 132,225 government attorneys indexed nationally. Browse government attorneys in Maryland →

Jurisdictional Context

Why local counsel matters in Maryland

Practicing law in Maryland. Legal matters in Maryland are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Rockville are typically filed in the local municipal court or the appropriate Maryland state district court, depending on subject matter and amount in controversy. An attorney licensed in Maryland 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 Maryland courts without local counsel or pro hac vice admission.

Looking for additional Maryland attorneys? Browse all attorneys in Rockville or all attorneys in Maryland.

Frequently Asked

Common questions about William David Day

Where is William David Day's law office located?
William David Day's law practice is located in Rockville, Maryland. The firm is Gill Sippel And Gallagher. You can contact the office directly through this profile page.
What practice areas does William David Day handle?
William David Day focuses on dui/dwi, trusts, criminal defense, litigation, government. Each practice area listed reflects experience handling cases of that type in Maryland.
How long has William David Day practiced law?
William David Day has 21+ years of legal experience and has been licensed since 2005.
Where did William David Day go to law school?
William David Day earned their education at (J.D., 2005); (B.S., 1995).
How can I contact William David Day for a consultation?
You can contact William David Day 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.
Columbus School of Law at Catholic University
- 2005
B.S.
United States Naval Academy
- 1995

Bar Admissions

Maryland
Admitted: 2005
District of Columbia
Admitted: 2006
Florida
Admitted: 2012

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