Atty. Mark H. Schlein
Mark H. Schlein transitioned to ”of counsel” status to Wisner Baum in 2022 and continues to focus on the firm’s whistleblower qui tam cases.
Consumer Fraud & More Attorney · Serving Washington, DC · 55+ Years Experience
Profile Summary
About Mark H. Schlein at a Glance
Mark H. Schlein is an Of Counsel based in Washington, District of Columbia. They have 55+ years of legal experience, licensed to practice since 1971. Their practice focuses on whistleblower and consumer. Admitted to practice in New York (1971), Florida (1994), U.S. District Court, Northern District of Florida (2004), and U.S. District Court, Middle District of Florida (2014). Educated at New York University (J.D., 1970) and University of Pennsylvania (B.S. Economics, 1967). Serves clients in Washington, DC and the surrounding metropolitan area.
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About Mark H. Schlein
- Mark H. Schlein transitioned to ”of counsel” status to Wisner Baum in 2022 and continues to focus on the firm’s whistleblower qui tam cases
- For 11 years he worked full time as the firm’s top whistleblower attorney, handling dozens of whistleblower cases
- Throughout a career spanning over 50 years as a police officer and a lawyer, Mark has been committed to public service and protection
- His unique experience as an urban police officer and attorney makes him particularly effective fighting fraud against the government
- While a government attorney, Mark participated in whistleblower litigation resulting in the recovery of billions of dollars at the state and federal level since 1993
- As a result, Mark has extensive experience working with whistleblowers in qui tam actions brought under the False Claims Act
- Mark began his career in the Broward County Sheriff’s Office (BSO) as a deputy in the patrol division
- In a career spanning 20 years, he commanded virtually every major operational component of the Broward County Sheriff’s Office
- This included the patrol division, the criminal investigations division and the special operations group which consisted of S.W.A.T., the aviation unit, marine unit, dive team, traffic, homicide, and the mounted patrol
- Mark also served as Accreditation Manager for the Commission on Accreditation for Law Enforcement Agencies (CALEA)
- In that capacity, he directed a broad revision of the department’s operating policies and procedures which resulted in BSO becoming the country’s 68th fully accredited law enforcement agency
- He retired in 1993 as a lieutenant colonel and the Director of the Department of Law Enforcement
- In 1994, Mark was asked by Florida Attorney General Robert A. Butterworth to head the Florida Medicaid Fraud Control Unit (MFCU) – the only agency in state government that is both a certified state police agency and a law firm
- The MFCU became a nationally recognized leader in health care fraud enforcement, utilizing a civil enforcement strategy to complement arrest and criminal prosecution as a deterrent to health care fraud
- Using civil remedies such as the False Claims Act, the Medicaid Fraud Control Unit was able to recover billions from corporate offenders on the state and federal level
- Mark directed a staff of 143, including 14 Assistant Attorney Generals and over 90 sworn criminal investigators that conducted thousands of criminal investigations, made over 1300 arrests and litigated hundreds of civil cases
- Mark managed the successful settlement of multi-million dollar health care fraud cases and helped develop global litigation strategies for the National Association of Medicaid Fraud Control Units
- At the end of his tenure with the Florida Attorney General’s Office, Mark entered private practice in the white-collar crime and healthcare fraud group at one of Florida’s largest and most respected law firms
- While there he represented clients who were under investigation by federal, state or local authorities
- After a brief time as Special Deputy General Counsel in Florida’s Department of Health, Mark started work in Florida’s Department of Financial Services as police legal advisor and manager of the major case squad in the Florida Division of Insurance Fraud (DIF)
- DIF is a state law enforcement agency with a staff of 196, including 150 sworn investigators, three attorneys and support staff located in eight bureaus throughout the state
- In fiscal year 2009/10 the Division of Insurance Fraud received 12,820 referrals and made 1042 arrests
- The Major Case Squad is a special unit of detectives who investigate complex, high profile cases assigned by the Chief Financial Officer or the DIF Director
- As a member of the Wisner Baum whistleblower protection team, Mark is able to give each whistleblower he represents an in-depth understanding of their situation, a unique perspective on the best strategy to implement in their case, and highly dedicated representation due to his broad experience and background
Practice Areas Explained
Mark H. Schlein's Areas of Legal Practice
Each practice area below reflects the types of cases Mark H. Schlein handles, with a practical overview of what that area of law involves and how it may apply to your situation in Washington.
Whistleblower & Retaliation in Washington
Mark H. Schlein is one of 3,523 whistleblower attorneys indexed nationally. Browse whistleblower attorneys in District of Columbia →
Consumer Protection in Washington
Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.
Mark H. Schlein is one of 50,226 consumer attorneys indexed nationally. Browse consumer 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.
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Professional Profile
Why Clients in Washington Choose Mark H. Schlein
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 H. Schlein's practice in the field of whistleblower and consumer.
Decade-Tested Legal Experience
Mark H. Schlein brings 55+ 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, Florida, and U.S. District Court, Northern District of Florida, Mark H. Schlein can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering whistleblower and consumer, Mark H. Schlein 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 H. Schlein attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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Mark H. Schlein's Practice Areas & Specializations
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