Atty. Mark Stefan Koster

Atty. Mark Stefan Koster

Mark Stefan Koster is a lawyer. Mark received a B.A. degree from Arizona State University in 1982, and has been licensed for 39 years.

Washington Washington 39 yrs experience 39 year
Call (443) 909-4791 Book Appointment

Attorney · Serving Washington, DC · 39+ Years Experience

Profile Summary

About Mark Stefan Koster at a Glance

Mark Stefan Koster is an Asst. Coun. based in Washington, District of Columbia. They have 39+ years of legal experience, licensed to practice since 1987. Admitted to practice in Maryland (1987). Educated at Catholic University of America (J.D., 1986) and Arizona State University (B.A., 1982). Serves clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated November 2026

About Mark Stefan Koster

  • Mark Stefan Koster is a lawyer
  • Mark received a B.A. degree from Arizona State University in 1982, and has been licensed for 39 years
  • Mark practices in Washington, DC

Jurisdictional Context

Why Local Counsel Matters in Washington

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 venue, 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.

Washington Courts and Legal Process

Choosing a Washington-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.

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

Frequently Asked

Common Questions About Mark Stefan Koster

Where is Mark Stefan Koster's law office located?
Mark Stefan Koster's law practice is located in Washington, District of Columbia. You can contact the office directly through this profile page.
How long has Mark Stefan Koster practiced law?
Mark Stefan Koster has 39+ years of legal experience and has been licensed since 1987.
Where did Mark Stefan Koster go to law school?
Mark Stefan Koster earned their education at (J.D., 1986); (B.A., 1982).
How can I contact Mark Stefan Koster for a consultation?
You can contact Mark Stefan Koster 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.

Professional Profile

Why Clients in Washington Choose Mark Stefan Koster

Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mark Stefan Koster's practice.

Decade-Tested Legal Experience

Mark Stefan Koster brings 39+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.

Local Presence in Washington

A Washington-based practice means Mark Stefan Koster attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.

Search Reference

How People Find Mark Stefan Koster Online

Prospective clients searching for legal help in Washington commonly use a combination of the attorney's name and their specific legal need. The following search terms frequently lead people to this profile and to attorneys like Mark Stefan Koster.

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If any of the above matches what you searched for, you've found the right profile. Use the contact options at the top of this page to get in touch with Mark Stefan Koster directly.

Education & Law School Background

J.D.
Catholic University of America
- 1986
B.A.
Arizona State University
- 1982

Bar Admissions & Licensed Jurisdictions

Maryland
Admitted: 1987

Client Reviews & Ratings — Mark Stefan Koster

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