Atty. Mark Thomas McDermott

Atty. Mark Thomas McDermott

Mr. Mark Thomas McDermott is a lawyer practicing litigation, aviation law, adoption law and 1 other area of law.

Washington Washington 52 yrs experience 52 year
Call (202) 367-9055 Book Appointment

Adoption Law & More Attorney · Serving Washington, DC · 52+ Years Experience

Profile Summary

About Mark Thomas McDermott at a Glance

Mark Thomas McDermott is a Member based in Washington, District of Columbia, practicing at Mark T. McDermott. They have 52+ years of legal experience, licensed to practice since 1974. Their practice focuses on adoption, litigation, and aviation. Admitted to practice in Indiana (1974), District of Columbia (1975), California (1978), and Virginia (1980). Educated at Indiana University (J.D., 1974) and Indiana University (B.S., 1970). Recognitions include AV Preeminent. Active member of Federal. Serves clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated October 2026

About Mark Thomas McDermott

  • Mr. Mark Thomas McDermott is a lawyer practicing litigation, aviation law, adoption law and 1 other area of law
  • Mark received a B.S. degree from Indiana University in 1970, and has been licensed for 52 years
  • Mark practices at Mark T. McDermott in Washington, DC

Practice Areas Explained

Mark Thomas McDermott's Areas of Legal Practice

Each practice area below reflects the types of cases Mark Thomas McDermott handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.

Adoption in Washington

Mark Thomas McDermott is one of 15,857 adoption attorneys indexed nationally. Browse adoption attorneys in District of Columbia →

Civil Litigation in Washington

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

Mark Thomas McDermott is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →

Aviation Law in Washington

Aviation attorneys for aircraft accidents, FAA regulation, pilot defense, and aviation industry matters.

Mark Thomas McDermott is one of 9,145 aviation attorneys indexed nationally. Browse aviation attorneys in District of Columbia →

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 Thomas McDermott

Where is Mark Thomas McDermott's law office located?
Mark Thomas McDermott's law practice is located in Washington, District of Columbia. The firm is Mark T. McDermott. You can contact the office directly through this profile page.
What practice areas does Mark Thomas McDermott handle?
Mark Thomas McDermott focuses on adoption, litigation, aviation. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Mark Thomas McDermott practiced law?
Mark Thomas McDermott has 52+ years of legal experience and has been licensed since 1974.
Where did Mark Thomas McDermott go to law school?
Mark Thomas McDermott earned their education at (J.D., 1974); (B.S., 1970).
How can I contact Mark Thomas McDermott for a consultation?
You can contact Mark Thomas McDermott 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 Mark Thomas McDermott received?
Mark Thomas McDermott's notable recognition includes: AV Preeminent.

Professional Profile

Why Clients in Washington Choose Mark Thomas McDermott

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 Thomas McDermott's practice in the field of adoption, litigation, and aviation.

Decade-Tested Legal Experience

Mark Thomas McDermott brings 52+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.

Multi-State Bar Admission

Licensed in Indiana, District of Columbia, and California, Mark Thomas McDermott can represent clients in cases that span state lines or require counsel in multiple jurisdictions.

Broad Practice Area Coverage

Covering adoption, litigation, and aviation, Mark Thomas McDermott can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.

Local Presence in Washington

A Washington-based practice means Mark Thomas McDermott 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 Thomas McDermott 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 Thomas McDermott.

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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 Thomas McDermott directly.

Mark Thomas McDermott's Practice Areas & Specializations

Education & Law School Background

J.D.
Indiana University
- 1974
B.S.
Indiana University
- 1970

Awards & Professional Honors

AV Preeminent

Bar Admissions & Licensed Jurisdictions

Indiana
Admitted: 1974
District of Columbia
Admitted: 1975
California
Admitted: 1978
Virginia
Admitted: 1980
Maryland
Admitted: 1982

Client Reviews & Ratings — Mark Thomas McDermott

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