Atty. William J. Sill

Atty. William J. Sill

Mr. William J.

Washington Washington 48 yrs experience 48 year
Call (771) 999-5447 Book Appointment

Profile Summary

About William J. Sill at a glance

William J. Sill is a Senior Counsel based in Washington, District of Columbia, practicing at Wilkinson Barker Knauer Llp. They have 48+ years of legal experience, licensed to practice since 1978. Their practice focuses on business. Admitted to practice in Pennsylvania (1978) and District of Columbia (1985). Educated at Temple University School of Law (J.D., 1978) and Temple University School of Communications & Theatre (B.A. Communications, 1975). Recognitions include AV Preeminent. Active member of Co-Chair, Wireless Telecommunications Practice Committee, 1996-1998, The District of Columbia Bar Pennsylvania and American Bar Associations Federal Communications Bar Association. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. William J. Sill is a lawyer practicing telecommunications law, commercial transactions, corporate law
  • William received a B.A. degree from Temple University School of Communications & Theatre in 1975, and has been licensed for 48 years
  • William practices at Wilkinson Barker Knauer, LLP in Washington, DC

Practice Areas Explained

William J. Sill's Areas of Practice

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

Business & Corporate Law

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

William J. Sill is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

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

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about William J. Sill

Where is William J. Sill's law office located?
William J. Sill's law practice is located in Washington, District of Columbia. The firm is Wilkinson Barker Knauer Llp. You can contact the office directly through this profile page.
What practice areas does William J. Sill handle?
William J. Sill focuses on business. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has William J. Sill practiced law?
William J. Sill has 48+ years of legal experience and has been licensed since 1978.
Where did William J. Sill go to law school?
William J. Sill earned their education at (J.D., 1978); (B.A. Communications, 1975).
How can I contact William J. Sill for a consultation?
You can contact William J. Sill 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.
What awards or recognition has William J. Sill received?
William J. Sill's notable recognition includes: AV Preeminent.

Education

J.D.
Temple University School of Law
- 1978
B.A. Communications
Temple University School of Communications & Theatre
- 1975

Awards

AV Preeminent

Bar Admissions

Pennsylvania
Admitted: 1978
District of Columbia
Admitted: 1985

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