Atty. Nathaniel E. Castellano

Atty. Nathaniel E. Castellano

Nathaniel E. Castellano is a lawyer practicing government contracts, national security.

Washington Washington 11 yrs experience 11 year
Call (771) 209-7478 Book Appointment

Profile Summary

About Nathaniel E. Castellano at a glance

Nathaniel E. Castellano is an Associate based in Washington, District of Columbia, practicing at Arnold And Porter Llp. They have 11+ years of legal experience, licensed to practice since 2015. Their practice focuses on securities and government. Admitted to practice in District of Columbia United States Court of Appeals for the Federal Circuit United States Court of F (2015). Educated at George Washington University Law School (J.D., 2015) and Roanoke College (B.A., 2012). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Nathaniel E. Castellano is a lawyer practicing government contracts, national security
  • Nathaniel E. received a B.A. degree from Roanoke College in 2012, and has been licensed for 11 years
  • Nathaniel E. practices at Arnold & Porter LLP in Washington, DC

Practice Areas Explained

Nathaniel E. Castellano's Areas of Practice

Each practice area below reflects the types of cases Nathaniel E. Castellano handles, with a brief overview of what that area of law covers.

Securities Law

Nathaniel E. Castellano is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in District of Columbia →

Government & Administrative Law

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

Nathaniel E. Castellano is one of 132,225 government attorneys indexed nationally. Browse government 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 Nathaniel E. Castellano

Where is Nathaniel E. Castellano's law office located?
Nathaniel E. Castellano's law practice is located in Washington, District of Columbia. The firm is Arnold And Porter Llp. You can contact the office directly through this profile page.
What practice areas does Nathaniel E. Castellano handle?
Nathaniel E. Castellano focuses on securities, government. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Nathaniel E. Castellano practiced law?
Nathaniel E. Castellano has 11+ years of legal experience and has been licensed since 2015.
Where did Nathaniel E. Castellano go to law school?
Nathaniel E. Castellano earned their education at (J.D., 2015); (B.A., 2012).
How can I contact Nathaniel E. Castellano for a consultation?
You can contact Nathaniel E. Castellano 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.
George Washington University Law School
- 2015
B.A.
Roanoke College
- 2012

Bar Admissions

District of Columbia United States Court of Appeals for the Federal Circuit United States Court of F
Admitted: 2015

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