MK

Margaret K Pfeiffer, Criminal Defense Attorney in Washington, District of Columbia

Over 52 years of legal practice · focused on Criminal Defense, Formation, and General · 5.0/5 rating from 1 verified client review

Senior CounselatSullivan And Cromwell Llp

Washington, DC

Practicing criminal defense in Washington since 1974.

52+
Years practicing
5.0 ★
1 client review
3
Bar admissions

Are you Margaret K Pfeiffer?

This profile was built from public bar records and is still unclaimed. Claim it free to control your photo, bio, and fees — and get client inquiries sent straight to you.

Claim this profile — free

Quick answer

Margaret K Pfeiffer is a senior counsel based in Washington, DC. The practice focuses on Criminal Defense, Formation, and General. Margaret has over 52 years of legal experience. Currently practicing at Sullivan And Cromwell Llp. Rated 5.0 out of 5 from 1 client review.

Based in
Washington, DC
Experience
over 52 years
Known for
Criminal Defense · Formation · General
  • Handles Criminal Defense, Formation, and General matters from Washington, DC.
  • Over 52 years of practice as a licensed attorney.
  • Recognized with AV Preeminent.

About Margaret K Pfeiffer: Margaret K Pfeiffer is a senior counsel based in Washington, DC. The practice focuses on Criminal Defense, Formation, and General. Margaret has over 52 years of legal experience. Currently practicing at Sullivan And Cromwell Llp. Rated 5.0 out of 5 from 1 client review.

Areas of practice

Practice areas handled by Margaret K Pfeiffer

Margaret concentrates on criminal defense, formation, general, ip, and securities. Each area below outlines the kind of case Margaret handles, typical outcomes to expect, and how the intake process starts.

Criminal Defense cases in Washington, District of Columbia

Margaret takes criminal defense matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Margaret agrees to represent you.

Formation cases in Washington, District of Columbia

Margaret takes formation matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Margaret agrees to represent you.

General cases in Washington, District of Columbia

Margaret takes general matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Margaret agrees to represent you.

IP cases in Washington, District of Columbia

Margaret takes ip matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Margaret agrees to represent you.

Securities cases in Washington, District of Columbia

Margaret takes securities matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Margaret agrees to represent you.

Biography

About Margaret K Pfeiffer — Over 52 years of District of Columbia criminal defense experience

Margaret K Pfeiffer is a senior counsel based in Washington, DC. The practice focuses on Criminal Defense, Formation, and General. Margaret has over 52 years of legal experience. Currently practicing at Sullivan And Cromwell Llp. Rated 5.0 out of 5 from 1 client review.

Mrs. Margaret K Pfeiffer is a lawyer practicing antitrust & trade law, intellectual property, corporate & incorporation and 2 other areas of law. Margaret received a B.A. degree from Duke University in 1967, and has been licensed for 52 years. Margaret practices at Sullivan & Cromwell LLP in Washington, DC and 1 other location.

How Margaret handles criminal defense matters

Mrs. Margaret K Pfeiffer is a lawyer practicing antitrust & trade law, intellectual property, corporate & incorporation and 2 other areas of law. Margaret received a B.A. degree from Duke University in 1967, and has been licensed for 52 years. Margaret practices at Sullivan & Cromwell LLP in Washington, DC and 1 other location.

Who Margaret represents

Margaret reviews new inquiries case-by-case for criminal defense, formation, and general matters in Washington and the surrounding District of Columbia area.

Credentials

Margaret K Pfeiffer's legal education and bar admissions

  • Rutgers University

    J.D. M.C.R.P. · 1974

  • Duke University

    B.A. Rutgers · 1967

Jurisdictions

Margaret's state bar admissions

  • District of Columbia

    1981 · ACTIVE

  • New York

    1976 · ACTIVE

  • New Jersey (Inactive

    1974 · ACTIVE

Margaret studied at J.D. M.C.R.P. in Rutgers University and B.A. Rutgers in Duke University.

Law school and academic background

Margaret completed J.D. M.C.R.P. in Rutgers University and B.A. Rutgers in Duke University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Margaret runs in District of Columbia is where that training gets applied to real client questions.

Recognition

Awards, publications, and recognition of Margaret K Pfeiffer

Margaret has received 1 formal recognition from bar associations, industry bodies, and peer-review services.

  • AV Preeminent

Legal awards and honors

AV Preeminent.

Locations

Margaret K Pfeiffer's office in Washington

Margaret's primary office is at 1701 Pennsylvania Avenue, N.W., Washington, DC, 20006-5805. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Sullivan And Cromwell Llp

1701 Pennsylvania Avenue, N.W.

Washington, DC 20006-5805

Open in Google Maps

Client feedback

Client reviews of Margaret K Pfeiffer — 5.0/5 rating from 1 verified client review

Every review below is from a verified client of Margaret. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing criminal defense attorneys in Washington.

5.0

1 client review

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Margaret K Pfeiffer claims this profile.

Read all reviews

Hiring guide

How to hire Margaret K Pfeiffer — what to expect in your first consultation

Working with a new criminal defense attorney should feel structured. Here's how the first two conversations with Margaret usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

Margaret charges for the initial consult. That fee is credited toward representation if you retain Margaret's office.

What to bring to your first meeting

Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Margaret will tell you what matters and what doesn't.

Questions to ask a criminal defense attorney in Washington, District of Columbia

A short list to run through before you commit: How many criminal defense matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?

Fees & payment

Fees, payment methods, and consultation options for Margaret

Margaret discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in criminal defense practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every criminal defense matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Margaret confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Margaret's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many criminal defense practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about Margaret K Pfeiffer

  • How much does it cost to hire Margaret for a criminal defense case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Margaret walks through the likely range during the consult so there are no surprises.

  • Does Margaret offer a free consultation?

    Margaret charges for the initial consult; that fee is credited toward representation if you retain Margaret's office. Some criminal defense attorneys offer free consults — check Margaret's current terms during booking.

  • How long do criminal defense cases in District of Columbia typically take?

    Simple criminal defense matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Margaret gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Margaret take my case if I'm outside Washington?

    Margaret is licensed in District of Columbia. Matters governed by District of Columbia law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Margaret will tell you if the case is a fit or refer you to someone closer to your court.

  • What should I bring to my first meeting with Margaret?

    Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Margaret will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is Margaret accepting new criminal defense clients right now?

    Margaret's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

Areas served

Criminal Defense attorneys serving Washington and Belize City in District of Columbia

Margaret handles criminal defense matters throughout District of Columbia. Each city below is a direct link into the search page for verified criminal defense attorneys in that community.

More counsel

If Margaret's intake is full or the fit isn't right, these criminal defense attorneys in Washington handle similar matters. Every profile below is verified and open to consultations.