Atty. Mark Sedlander
Mark Sedlander is a trial attorney and litigator whose practice consists of white collar defense, government investigations, and business litigation. Mr.
Business Litigation & More Attorney · Serving Los Angeles, CA · 17+ Years Experience
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.
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About Mark Sedlander
- 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 Legal Practice
Each practice area below reflects the types of cases Mark Sedlander handles, with a practical overview of what that area of law involves and how it may apply to your situation in Los Angeles.
Business & Corporate Law in Los Angeles
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Mark Sedlander is one of 497,491 business attorneys indexed nationally. Browse business attorneys in California →
White Collar Crimes in Los Angeles
Mark Sedlander is one of 19,824 white collar attorneys indexed nationally. Browse white collar attorneys in California →
Civil Litigation in Los Angeles
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Mark Sedlander is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in California →
Government & Administrative Law in Los Angeles
Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.
Mark Sedlander is one of 131,162 government attorneys indexed nationally. Browse government attorneys in California →
Jurisdictional Context
Why Local Counsel Matters in Los Angeles
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.
Los Angeles Courts and Legal Process
Choosing a Los Angeles-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 California attorneys? Browse all attorneys in Los Angeles or all attorneys in California.
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Professional Profile
Why Clients in Los Angeles Choose Mark Sedlander
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 Sedlander's practice in the field of business, white collar, litigation, and government.
Decade-Tested Legal Experience
Mark Sedlander brings 17+ 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 New York and California U.S. District Court, Eastern District of New York U.S. District Court, Southern District , Mark Sedlander can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering business, white collar, and litigation, Mark Sedlander can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Los Angeles
A Los Angeles-based practice means Mark Sedlander attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Mark Sedlander Handles in Los Angeles
Below is a representative sample of the types of matters Mark Sedlander has experience with under California law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Mark Sedlander directly to discuss the specifics of your situation.
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How People Find Mark Sedlander Online
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Mark Sedlander's Practice Areas & Specializations
Education & Law School Background
Bar Admissions & Licensed Jurisdictions
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