Atty. Mark Sedlander

Atty. Mark Sedlander

Mark Sedlander is a trial attorney and litigator whose practice consists of white collar defense, government investigations, and business litigation. Mr.

Los Angeles Los Angeles 17 Years Experience 17 year
Call (424) 363-4687

Profile Summary

About Mark Sedlander at a glance

Mark Sedlander is an Of Counsel based in Los Angeles, California, practicing at Mancini Shenk LLP. They have 17+ years of legal experience, licensed to practice since 2009. Their practice focuses on business, white collar, litigation, and government. Admitted to practice in New York (2009) and California U.S. District Court, Eastern District of New York U.S. District Court, Southern District (2015). Educated at Georgetown University (J.D., 2008) and University of California, Santa Barbara (B.A., 2003). Active member of American Bar Association The Association of the Bar of the City of New York. Serves clients in Los Angeles, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Sedlander is a trial attorney and litigator whose practice consists of white collar defense, government investigations, and business litigation
  • Mr. Sedlander has represented corporate clients and individuals, including executives, management personnel, and other corporate employees
  • His practice involves a wide range of industries, including health care, technology, commercial cannabis, import/export licensing violations in the commercial and national security context, and aviation management
  • He defends clients accused of wire fraud, bank fraud, mail fraud, bankruptcy fraud, mortgage fraud, securities fraud, violations of the Racketeer Influenced and Corrupt Organizations Act, and other white collar criminal and regulatory offenses
  • He regularly negotiates with the Department of Justice and other prosecuting and investigative agencies
  • He has successfully defended clients in federal and state investigations, and won significant, high-stakes courtroom victories
  • His civil litigation practice involves business disputes and other matters in state and federal courts and in arbitration proceedings
  • Before joining Mancini Shenk LLP, Mr. Sedlander represented clients charged with federal criminal offenses with the Office of the Federal Public Defender in the Central District of California
  • He handled complex commercial matters as an Associate in the litigation department at a New York City law firm and clerked for the Honorable Fernando M. Olguin in the United States District Court for the Central District of California in Los Angeles
  • Representative Matters • Represented former executive and senior management of a large medical management services company during an investigation by California state regulators, the United States Department of Health & Human • Services, and the United States Department of Justice. • Obtained dismissal on due process grounds of a federal criminal case alleging illegal reentry into the United States. • Significant experience defending against Racketeer Influenced and Corrupt Organizations Conspiracy (“RICO”) charges. • Prevailed on appeal on behalf of a medical partnership in anti-SLAPP litigation, with the California Court of Appeal affirming the trial court’s finding that claims against the partnership were barred. • Obtained a government dismissal following a motion to dismiss on grounds that the indictment and police ballistics report failed to allege facts demonstrating that a damaged pistol was a “firearm” under the relevant criminal statute. • Obtained a favorable settlement defending a large hospital group in a contract dispute with a national healthcare provider. • Worked as co-counsel with the Office of the Michigan Attorney General and Solicitor General on behalf of the Michigan Workers’ Compensation Insurance Agency in a Second Circuit appeal, arguing for dismissal on grounds of state sovereign immunity in bankruptcy proceedings
  • Education Mark earned his J.D. at Georgetown Law
  • He received his undergraduate degree with high honors from the University of California, Santa Barbara, and is a member of Phi Beta Kappa
  • Bar Admissions Mark is a member in good standing of the State Bars of California and New York, admitted to practice before the Supreme Court of California and all of California’s lower state courts, the New York Court of Appeals and all of New York’s lower state courts, the United States District Court for the Central District of California, the United States District Courts for the Eastern and Southern Districts of New York, and the United States Court of Appeals for the Ninth Circuit
  • Professional Affiliations Mark is a member of The Century City Bar Association Board of Governors
  • The Federal Bar Association, Criminal Law and Federal Litigation Sections
  • The American Bar Association, Criminal Justice and Business Law Sections, White Collar Crime Committee
  • and The Los Angeles County Bar Association, Criminal Justice, Healthcare Law, and Litigation Sections

Practice Areas Explained

Mark Sedlander's Areas of Practice

Each practice area below reflects the types of cases Mark Sedlander 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.

Mark Sedlander is one of 452,854 business attorneys indexed nationally. Browse business attorneys in California →

White Collar Crimes

Mark Sedlander is one of 18,196 white collar attorneys indexed nationally. Browse white collar attorneys in California →

Civil Litigation

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

Mark Sedlander is one of 409,070 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Government & Administrative Law

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

Mark Sedlander is one of 118,414 government attorneys indexed nationally. Browse government attorneys in California →

Jurisdictional Context

Why local counsel matters in California

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

Looking for additional California attorneys? Browse all attorneys in Los Angeles or all attorneys in California.

Frequently Asked

Common questions about Mark Sedlander

Where is Mark Sedlander's law office located?
Mark Sedlander's law practice is located in Los Angeles, California. The firm is Mancini Shenk LLP. You can contact the office directly through this profile page.
What practice areas does Mark Sedlander handle?
Mark Sedlander focuses on business, white collar, litigation, government. Each practice area listed reflects experience handling cases of that type in California.
How long has Mark Sedlander practiced law?
Mark Sedlander has 17+ years of legal experience and has been licensed since 2009.
Where did Mark Sedlander go to law school?
Mark Sedlander earned their education at (J.D., 2008); (B.A., 2003).
How can I contact Mark Sedlander for a consultation?
You can contact Mark Sedlander 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.
Georgetown University
- 2008
B.A.
University of California, Santa Barbara
- 2003

Bar Admissions

New York
Admitted: 2009
California U.S. District Court, Eastern District of New York U.S. District Court, Southern District
Admitted: 2015

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