Mr Daniel Culley > Cleary Gottlieb Steen & Hamilton > New York, United States > Lawyer Profile

Offering a comprehensive cross-border practice, Cleary Gottlieb Steen & Hamilton is equipped to handle the full range of cartel work, including both civil and criminal investigations, litigation defense, and enforcement matters. Regulatory advice is another strength of the team, which includes several former officials from the FTC and the DOJ. Leah Brannon leads the team alongside Jeremy Calsyn, who specializes in global cartel investigations and defense in follow-on class actions. Brannon is recommended for handling investigations by the DOJ, FTC and the European Commission. Being particularly experienced in the application of complex economics to antitrust matters, Kenneth Reinker’s practice spans an array of industries, including pharmaceuticals, medical devices, healthcare, high-technology, media and financial institutions. Daniel Culley has a track record in cross-examinations of government witnesses and focuses on high-tech industries and two-sided markets, while Brian Byrne in San Francisco is adept in cross-border enforcement matters, as well as antitrust-related civil litigation and reviews of M&A. Experienced first-chair trial attorney Heather Nyong’o is equipped to represent her clients, which include multinational corporations and executives, in domestic and international cartel investigations and litigation. Unless stated otherwise, all mentioned lawyers are based in Washington DC.

Underscoring its status as a destination antitrust practice, Cleary Gottlieb Steen & Hamilton remains active on complex and market-defining merger mandates for blue-chip corporates and private equity investors, standing out for its work on  contentious merger-related investigations and litigation. The team boasts strong multijurisdictional capabilities, regularly working with its teams in Europe on cross-border merger control mandates, and excels in securing approvals for deals in industries facing regulatory scrutiny. Practice co-head Leah Brannon is a vastly experienced figure with a track record in global merger approvals. Jeremy Calsyn also co-heads the team, and is active on a host of complex matters, notably representing Korean Air in the DOJ investigation in its $1.4bn acquisition of Asiana Airlines. Elsewhere in the team, George Cary continues to lead on business-critical mergers, while Brian Byrne, based in both San Francisco and Washington DC, handles strategic clearances for a diverse roster of clients. David Gelfand has enjoyed recent success in four litigated merger challenges involving the States Attorneys General, the FTC and DOJ, and Bruce Hoffman, former Director of the FTC’s Bureau of Competition, regularly advises on significant merger clearance matters and investigations. Daniel Culley is a go-to for business-critical mergers, government investigations, and litigation for top-level clients in a wide range of industries, particularly within the tech industry. Clients turn to both Kenneth Reinker and Elaine Ewing for their expertise across deals in a wide range of industries, encompassing contentious investigations and global approvals. The team was strengthened by the 2023 arrival of Ryan Shores, formerly at A&O Shearman, a prolific merger counsel who is trial lead on the JetBlue merger. Attorneys are based in Washington DC unless otherwise stated.