Niels Dejean focuses his practice on French tax matters, advising clients on tax law, tax controversy and dispute resolution, private equity and mergers & acquisitions areas.
Before joining McDermott Will & Schulte, Niels was the partner in charge of the French tax practice of a US law firm. He also has prior experience within a major audit firm (both in France and in the United States) and has particular strength in cross-border matters and the interaction of French and US tax.
- Advised a multinational French company on the sale of its power and grid businesses to a US conglomerate*
- Advised the management of an IT product supplier in connection with the purchase of a significant stake in its company through several buy-out transactions sponsored by various private equity firms*
- Advised an independent European private equity firm on the acquisition, the build-up and the sale of a controlling stake in an environmental services company*
- Legal 500 EMEA, Hall of Fame, Tax, 2025-2026
- Chambers France, Tax, 2026
- The Best Lawyers in France, Corporate Law, Private Equity Law, Private Funds & Tax Law, 2010-2026
- Chambers Europe, Tax, 2024
- International Tax Review, World Tax, 2025-2026
- Université Val-de-Marne, Paris
- DESS International Tax
- Paris
- English
- French

Dr. Maximilian Uibeleisen
Dr. Maximilian Uibeleisen focuses his practice on clients working around energy and infrastructure, with particular experience in advising corporates and financial investors with regard to the development and acquisition and sale of energy and infrastructure assets.
Max has a particular focus on the renewable energy sector, where he has advised for almost 20 years on a large number of project developments and transactions relating to all different kinds of renewables facilities (including offshore and onshore wind, solar, biomass, geothermal) as well as energy transition (e.g. green hydrogen and battery storage).
Next to this work in the energy sector, Maximilian frequently advises in other infrastructure sectors, including in the German motorway PPP sector, the chemicals sector and in relation to digital infrastructure assets.
Maximilian studied law at the universities of Tübingen, Münster and Berlin (Dr. iur.) and holds a master degree (LL.M.) from Nottingham Trent University. He was admitted to the German bar in 2006. He is the author of various German and international publications and is co-author of one of the leading German commentaries on energy law.
Max advised:
- JUWI on the sale of the Diehlo West wind project to Berliner Stadtwerke
- Kajoni on the sale of a portfolio of BESS projects (750 MW) for participation in the merit-based grid connection procedure of the German TSOs
- Octopus Energy on the acquisition of four onshore windfarms in Germany
- Spring Creek and CleanCap on investment in German solar and battery portfolio with MEC Energy
- Lexology Index, Germany: Environment and Energy, 2027
- Lexology, “Thought Leader” in Germany, 2026
- Handelsblatt/Best Lawyers™, Germany: Energy Law, Public Law, Public Private Partnership as well as Mergers and Acquisitions Law, 2020-2027
- Nottingham Trent University, LL.M.
- Humboldt-University of Berlin, Dr. iur.
- Germany
- German
- English

Fatema Orjela
Fatema is an award-winning private equity partner whose practice focuses on providing strategic counsel to European and US private equity sponsors. She has pan-European cross sector experience on the full range of corporate matters, including leveraged buyouts, strategic mergers and acquisitions, divestitures, joint ventures, structured and minority equity investments, equity and debt restructurings, and management equity plans, as well as related advisory work.
Further examples of Fatema’s work include acting for Private Equity, Corporate M&A, Sovereign Wealth, and Distressed investors as follows:
Private Equity (large, mid, small cap):
- Achieve Partners on its acquisition of a majority stake in Boclips, whose library of video and audio content is used by publishers, schools, universities, and Ministries of Education around the world, and which is headquartered in the UK*
- Altamont Capital on its acquisition of Accelerant, a vertically integrated insurance company focused on UK and EU SMEs, and the establishment of Accelerant’s bolt-on buy-out platform*
- Apollo Global Management, LLC (through certain investment funds affiliated therewith) and its portfolio, CareerBuilder, on the disposal of Textkernel, a global leading AI-powered HR technology provider, to Main Capital Partners*
- IFLR1000, Private Equity: Notable Practitioner, 2025
- Chambers UK, Private Equity: Buyouts: £500 million and above, 2024-2027
- Legal 500 UK, Leading Partner, Private Equity: Transactions – Mid-Market Deals (Up to £500m), 2024-2027
- Private Equity News, Twenty Most Influential Private Equity Lawyers, 2025
- Euromoney, Women in Business Law EMEA Awards, Private Equity Lawyer of the Year, 2023. Finalist in 2021-2022.
- Law360, Rising Star in Private Equity, 2022, named to a list of lawyers under 40 “whose legal accomplishments transcend their age”
- Law.com, Rising Stars: The UK’s Best 25 Under 40 Up and Coming Female Lawyers, 2022
- The Law Society of England and Wales, Excellence Awards, Woman Solicitor of the Year, 2021
- Private Funds Management, 30 under 40, 2017, named as one of the world’s top 30 private equity lawyers under 40
- Women in Law, London, co-founder
- Oxford Women in Law, advisory panel member
- Oxford Institute of Legal Practice, LPC
- Brasenose College, Oxford University, BA, Jurisprudence
- England and Wales

Susan E. Ryba
Advises clients on federal tax controversy matters and tax litigation across the technology, healthcare, and pharmaceutical sectors
Represents high-net-worth individuals and complex partnerships
Handles all stages of federal tax controversies, including audits, administrative appeals, alternative dispute resolution, and litigation
Counsels clients on domestic and international tax issues, including transfer pricing, research credits, Subpart F, and foreign tax credits
Susan E. Ryba focuses her practice on federal tax controversy matters and tax litigation, particularly advising clients in the technology, healthcare, and pharmaceutical sectors, as well as high-net-worth individuals and complex partnerships.
Susan has substantial experience in all stages of federal tax controversies, including audits, administrative appeals, alternative dispute resolution proceedings, and litigation. She has resolved most of her matters at the Internal Revenue Service (IRS) examination level or through the IRS Independent Office of Appeals (IRS Appeals) and other dispute resolution forums. She advises clients on a broad range of domestic and international tax issues, including transfer pricing, research credit, effectively connected income, passive activity losses, Subpart F, Section 965, economic substance and other related doctrines, worthless stock and debt deductions, foreign-derived intangible income, foreign tax credits, summons enforcement, and penalties.
Susan frequently speaks at seminars sponsored by the Tax Executives Institute and teaches trial skills for the National Institute for Trial Advocacy.
- Resolved on favorable grounds a multibillion-dollar transfer pricing dispute for a technology company involving several intercompany services transactions with IRS Exam
- Facebook, Inc. v. Commissioner, 164 T.C. No. 9 (May 22, 2025). Taxpayer victory in a multibillion-dollar section 482 transfer pricing dispute regarding the arm’s-length value of a platform contribution transaction between cost-sharing participants under Treas. Reg. § 1.482-7.*
- Resolved several multibillion-dollar tax controversies at the IRS Appeals for technology and pharmaceutical companies involving transfer pricing issues, including intercompany licenses of intangible property, intercompany services, and platform contribution transactions
- Legal 500 US, Recommended, 2025
- Lawdragon, Leading Global Tax Lawyer, 2025-2026
- Crain’s Chicago Business, Notable Woman in Law, 2022
- International Tax Review World Tax, 2015-2023 and 2025-2026
- The Chicago Bar Association, member
- Illinois State Bar Association, member
- American Bar Association, member
- The Ohio State University Moritz College of Law, JD, magna cum laude, Order of the Coif
- Cornell University, BS, magna cum laude
- Illinois
- US Tax Court
- US District Court for the Northern District of Illinois
- US Court of Federal Claims
- English

Kelly D. Newsome
Kelly Newsome advises corporations and individuals in white-collar criminal and regulatory matters across the globe. Her practice focuses on the Foreign Corrupt Practices Act (FCPA) and other anti-corruption laws and regulations. She represents clients in a variety of industries, including oil and gas; hospitality and tourism; life sciences, medical device and pharmaceutical; and financial services.
- Served as counsel to the independent compliance monitors appointed by the US Department of Justice (DOJ) and US Securities and Exchange Commission (SEC) to conduct a three-year FCPA compliance monitorship of a multinational petrochemical company*
- Represented a multinational medical device company under a three-year DOJ and SEC-imposed FCPA compliance monitorship*
- Conducted pre- and post-acquisition anti-corruption due diligence for a multinational oil and gas company in West Africa*
- New York Law Journal, Rising Star, 2022
- National Bar Association, Top 40 Under 40 – Nation’s Best Advocates, 2023
- Global Investigations Review’s GIR 100, Recommended, 2024
- The New York Landmarks Conservancy, board member
- National Bar Association, member
- New York City Bar Association, member
- Georgetown University Law Center, JD
- Sciences Po Paris, Master 2
- University of Missouri, MPA
- University of Missouri, BA
- New York
- US District Court for the Southern District of New York
- US District Court for the Eastern District of New York
- English
- French

Caitlin Sheard
Caitlin Sheard helps companies and individuals navigate high-stakes white-collar criminal investigations and enforcement matters, with a focus on the Foreign Corrupt Practices Act (FCPA) and anti-corruption compliance. She represents clients around the world in industries ranging from life sciences to oil and gas, technology, and manufacturing.
- Advised a multinational company under an FCPA monitorship*
- Represented a medical device company in an FCPA enforcement action brought by the DOJ and SEC*
- Conducted multiple internal investigations into potential FCPA violations and internal controls breaches on behalf of clients in Europe, the Middle East and Asia*
- Global Investigations Review’s GIR 100, Recommended, 2024
- George Washington University Law School, JD, with high honors, Order of the Coif
- Wake Forest University, BA, summa cum laude
- District of Columbia
- New York
- English
- French

Franklin Monsour Jr.
Franklin Monsour Jr. is a former federal prosecutor and seasoned trial lawyer who focuses his practice on white-collar defense, regulatory enforcement matters, and complex commercial litigation. He also has substantial experience handling False Claims Act (FCA) matters.
Franklin has a proven track record of success. His cases have been featured in national news media, including the well-publicized healthcare fraud case of United States v. Kenia Valle Boza, in which Franklin won a full acquittal after a two-week jury trial. The Department of Justice (DOJ) had alleged that Ms. Valle Boza orchestrated a five-year conspiracy to fraudulently bill up to $50 million in medical claims to Medicare. Franklin and his team put on an extensive defense case, admitting far more evidence than the government and allowing the jury to see what actually occurred. It took the jury only four hours to acquit Ms. Valle Boza of all charges.
- Global Investigations Review’s GIR 100, Recommended, 2024
- Defense Criminal Investigative Service, commendation
- US Army, Patriotic Service Medal
- US Drug Enforcement Administration, commendation
- B. B. Allen Award
- Benjamin N. Cardozo School of Law, JD, cum laude
- Virginia Commonwealth University, BA
- New York
- US Court of Appeals for the Eleventh Circuit
- US Court of Appeals for the Seventh Circuit
- US District Court for the Southern District of New York
- US District Court for the Eastern District of New York

Anne Elkins Murray
Anne Murray is an experienced white-collar defense, corporate investigations and compliance lawyer who helps clients navigate the most sophisticated ethics, fraud and corruption issues. She defends companies and individuals in investigations by the US Department of Justice (DOJ), the US Securities and Exchange Commission (SEC) and other government agencies. Anne also conducts internal investigations on behalf of companies or their boards into allegations related to bribery, corruption, accounting fraud, earnings management, improper revenue recognition, embezzlement and other misconduct.
Investigations
- Represented a special committee of the board in an investigation into embezzlement by a company’s senior executives*
- Conducted an internal investigation into allegations of earnings management by senior leaders of a publicly traded company*
- Defended a multinational corporation in a five-year corruption and bribery investigation by the DOJ and SEC that spanned South America, Europe, Asia and Australia, and obtained government declination letters*
- Chambers Global, FCPA: USA, 2022-2025
- Chambers USA, FCPA, 2022-2025
- Global Investigations Review, Women in Investigations, 2025
- Global Investigations Review’s GIR 100, Recommended, 2024
- Super Lawyers, Washington, DC, Rising Star, 2014-2019
- GIR Just Anti-Corruption, Washington DC’s FCPA Bar, highly recommended
- American University Washington College of Law, JD, cum laude
- Middlebury College, BA
- District of Columbia
- Massachusetts
- US District Court for the District of Massachusetts

Guy Singer
A former federal prosecutor and seasoned trial lawyer, Guy Singer focuses his practice on complex white-collar criminal defense, regulatory enforcement and compliance matters, and internal investigations. He counsels clients across a broad range of industries, including healthcare, life sciences, oil and gas, technology and maritime.
- Represented a large multinational company in the healthcare industry before the DOJ and SEC in a multi-year FCPA investigation that spanned five continents*
- Represented an oil and gas company in connection with internal and DOJ anticorruption investigations, third-party due diligence and a variety of compliance matters, including drafting anticorruption policies and procedures*
- Conducted large internal investigations into allegations of FCPA and other criminal violations in multiple countries for several large multinational companies in the shipping, oil and gas, engineering and commodities industries*
- Global Investigations Review’s GIR 100, Recommended, 2024
- Chambers USA, FCPA: Nationwide, 2017-2022 and 2025; Litigation: White-Collar Crime & Government Investigations: District of Columbia, 2018-2019 and 2025
- Chambers USA, FCPA: Global, 2019-2020
- New England Law Boston, JD
- University of Hartford, BA
- District of Columbia
- New York

Sagar K. Ravi
Advises companies and individuals in white-collar defense, regulatory enforcement matters, and high-stakes government investigations
Manages sensitive internal investigations across a range of industries and advises on government reporting and remediation
Leads comprehensive incident response teams for companies facing urgent cross-border cybersecurity incidents, ransomware attacks, and AI-related risks
Tries complex civil and criminal cases and represents clients at all stages of litigation
Sagar K. Ravi brings nearly a decade of experience as a federal prosecutor and seasoned trial lawyer to advise clients facing a wide range of white-collar and regulatory enforcement matters and high-stakes disputes. His practice focuses on cutting-edge issues at the intersection of law and technology, including digital assets, privacy and cybersecurity, healthcare fraud, consumer protection, and artificial intelligence (AI). Leveraging his extensive engagement with US Department of Justice (DOJ) components, state attorneys general, and civil regulators, Sagar helps companies and individuals navigate complex, consequential investigations involving multiple government agencies and stakeholders and any ensuing litigation.
Recognized nationally for his experience handling novel, high-profile criminal cyber and national security matters, Sagar provides strategic counsel to clients facing sensitive cross-border cybersecurity incidents, ransomware attacks, and AI-related risks. He also advises clients on the full spectrum of digital asset issues, including cryptocurrency theft and investment fraud, smart contract manipulation, fraud in non-fungible token (NFT) offerings, and crypto-enabled money laundering.
Before joining the firm, Sagar served as chief of the Complex Frauds and Cybercrime Unit at the US Attorney’s Office for the Southern District of New York (SDNY), where he led a team of 20 senior prosecutors handling the most sophisticated fraud and cyber cases in the country, many of which were international in scope. He oversaw groundbreaking investigations, including some of the first US criminal investigations involving AI.
As a prosecutor, Sagar led and supervised cases and cross-border investigations involving healthcare fraud, the False Claims Act (FCA), securities and investment fraud, intellectual property and trade secrets theft, consumer fraud, tax offenses, sanctions, the Foreign Corrupt Practices Act (FCPA), and money laundering and the Bank Secrecy Act (BSA). During his time at SDNY, Sagar tried and supervised 23 federal criminal trials to verdict and handled 10 appeals before the US Court of Appeals for the Second Circuit. In addition to the DOJ, through his extensive experience with joint and parallel investigations, Sagar has had regular engagement with multiple civil regulators, including the US Securities and Exchange Commission (SEC), the US Commodity Futures Trading Commission (CFTC) and the Federal Trade Commission (FTC), among others.
Earlier in his career, Sagar clerked for the Honorable Kiyo A. Matsumoto of the US District Court for the Eastern District of New York and practiced at an international law firm representing corporate and individual clients in a variety of white-collar matters.
Recognized in
Global Investigations Review’s GIR 100 as a Recommended Lawyer, 2024
- Represented a global technology company in a broad FTC investigation that resulted in a declination
- Represented a technology company in successfully dismissing several federal class actions alleging unfair and deceptive practices and false advertising after a data breach
- Represented an investment banking firm and partner in a parallel DOJ and SEC insider trading investigation that resulted in a declination
- Represented a healthcare company in a DOJ probe of gender-affirming care for minors that resulted in withdrawal of a subpoena
- Represented publicly traded companies, including a Fortune 50 company, in separate investigations by the Office of the Attorney General for the District of Columbia that all resulted in declinations
- Represented an information technology company in a DOJ public corruption investigation that resulted in a declination
- Successfully defended a technology services provider against alleged civil violations of the Computer Fraud and Abuse Act (CFAA)
- Represented a senior employee of publicly traded company in a DOJ joint civil-criminal investigation of compliance with the Buy American Act (BAA) and Trade Agreements Act (TAA) in connection with federal contracts that resulted in a declination
- Represented an international publishing company in resolving federal class action litigation alleging unfair and deceptive practices and false advertising
- Represented a global consulting firm in connection with a sanctions investigation
- Representing a victim of a more than $60 million fraud in an affirmative civil Racketeer Influenced and Corrupt Organizations Act (RICO) lawsuit in federal court
- Representing a defense contractor and its CEO in a DOJ national security investigation involving classified materials
- Serving as breach counsel to a major labor union facing a cyber incident perpetrated by a new ransomware threat actor
- Representing a publicly traded pharmaceutical company, nationwide healthcare provider, and technology startup in separate FCA investigations by DOJ
- Attorney General’s Award for Distinguished Service, 2022
- National Intelligence Meritorious Unit Citation, 2020
- Federal Law Enforcement Foundation Prosecutor of the Year Award, 2020
- Law360, White Collar Editorial Advisory Board, 2025
- Asian Pacific American Bar Association – District of Columbia, member
- National Asian Pacific American Bar Association, member
- South Asian Bar Association of Washington, DC, member
- Columbia Law School, JD
- Washington University in St. Louis, BA, summa cum laude
- District of Columbia
- New York
- Virginia
- US Court of Appeals for the Second Circuit
- US District Court for the Southern District of New York
- US District Court for the Eastern District of New York
- English
