Washington DC Whistleblower Law Firm

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Constantine Cannon | Washington D.C.

Washington DC Whistleblower Attorneys 1001 Pennsylvania Ave, NW, Suite 1300N
Washington, D.C. 20004
T: 202.204.3500
F: 202.204.3501
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Blow the Whistle

Constantine Cannon’s Washington D.C. whistleblower attorneys represent whistleblowers for the same reasons that courageous men and women come forward to expose wrongdoing: we believe in accountability, justice, and fairness, whether that’s for taxpayers, investors, consumers, competitors, or the government.

Our attorneys have acted as lead counsel to recover over $1 billion for federal and state governments and over $450 million in whistleblower rewards for our clients. In 2020, we finalized four blockbuster settlements and secured some of the highest whistleblower rewards in the history of the False Claims Act.  In 2021, we had another banner year with historic whistleblower successes.  This is in addition to the more than $5 billion in damages and tens of billions of dollars more in injunctive relief Constantine Cannon has recovered for the firm’s other clients, including two of the top five antitrust settlements in U.S. history.

Our firm has extensive experience working with government attorneys in Washington D.C., including the U.S. Attorney’s Office, the Internal Revenue Service, the Securities and Exchange Commission, the U.S. Department of Justice, the U.S. Department of Transportation, and many other agencies. Please contact our office to schedule a consultation regarding your case. Our whistleblower lawyers in D.C. can help you explore your legal options.

Whistleblowing and the False Claims Act

Whistleblowers can bring claims under the federal False Claims Act or the District of Columbia False Claims Act to report fraud and misconduct in government contracts and programs.  These acts allow whistleblowers to bring a qui tam suit and receive a share of the government’s recovery (between 15% and 30%).

The key element of a whistleblower case under the federal FCA or the DC FCA is evidence that the government was defrauded. Simply put, wherever government money is involved, there may be a false claim. Some of the most common types of False Claims Act matters include:

Whistleblowing under Federal Agency Reward Programs

In addition to the federal and local False Claims Acts, there are other laws and reward programs that provide a financial benefit to successful whistleblowers. These include:

Claims to these agency programs are made to their D.C. offices, although they may be investigated by agency attorneys in other offices.

Meet the Washington DC Whistleblower Attorneys of Constantine Cannon

Michael Ronickher

DC Whistleblower Attorney Michael Ronickher Michael Ronickher is a partner in the Washington, DC, office of Constantine Cannon LLP. He represents a broad range of whistleblowers, including in healthcare, defense, and financial frauds, with a particular specialty in representing tax whistleblowers. For his work, Mr. Ronickher was recognized in 2019 as a Law360 Rising Star.

Mr. Ronickher currently represents numerous whistleblowers in sealed litigations under federal and state False Claims Acts, where he helps clients navigate the sometimes-confusing process and helps the government investigate the alleged frauds. Read DC whistleblower attorney Michael Ronickher’s full bio.


Diane M. Ring

Washington-DC-Whistlebower-Attorney-Diane-M.-Ring Professor Diane M. Ring is Of Counsel to the Whistleblower Practice in Washington DC, advising on substantive tax issues that arise in IRS and state tax whistleblower matters. She provides legal analysis of the most complex tax issues that whistleblowers bring forward.

In addition to her role at Constantine Cannon, Professor Ring is Professor of Law and the Dr. Thomas F. Carney Distinguished Scholar at Boston College Law School, where she researches and writes primarily in the fields of international taxation, corporate taxation, and ethical issues in tax practice. Read DC whistleblower attorney Diane M. Ring’s full bio.

Click here to meet the rest of the Constantine Cannon whistleblower team.

Contact a Washington D.C. Whistleblower Lawyer Today

Reporting fraud and seeking to hold wrongdoers accountable for their actions can be a rewarding and noble undertaking. There can also be tremendous satisfaction in finally being heard and having the government investigate your concerns. But becoming a whistleblower sometimes comes with substantial risks, which underscores the importance of working with experienced legal counsel. At Constantine Cannon, we have the experience and expertise to help you assess your legal options, and the skills and investigative resources to help hold accountable those that defraud the government or the public.

Please contact our office to schedule a consultation with one of our whistleblower attorneys in Washington D.C. so that we can help you explore your potential options.


Learn about Whistleblower Rewards Programs