Mr Jeff Sinek > Kirkland & Ellis LLP > Los Angeles, United States > Lawyer Profile

Kirkland & Ellis LLP
United States
Jeff Sinek photo


Jeff Sinek, a former Assistant United States Attorney, is a partner in the Commercial Litigation and White Collar Criminal Defense & Securities Enforcement groups. Jeff’s practice focuses on white collar criminal defense and related civil litigation. Jeff represents companies and individuals in federal and state criminal and regulatory investigations. Jeff conducts internal investigations for publicly traded corporations. He has tried more than 20 jury trials, in both criminal and civil cases.

From 1989 to 1994, Jeff served as an Assistant United States Attorney in the Criminal Division of the United States Attorney’s Office for the Central District of California. Jeff received commendations from several law enforcement agencies, including the IRS.


University of California, Berkeley, School of Law, J.D., 1987, Earned two American Jurisprudence Awards; Harvard College, B.A., Government, cum laude,1984,Dean’s List, Harvard College Scholarship for Academic Achievement of High Distinction.

Lawyer Rankings

United States > Dispute resolution > Corporate investigations and white-collar criminal defense

Kirkland & Ellis LLP‘s group is led by veteran Washington DC- and Chicago-based white-collar lawyer Mark Filip, who represents corporates, financial institutions and individuals in the gamut of sensitive investigations and criminal prosecutions. Filip and Chicago-based Mark Schneider are representing Allergan in various state and federal government investigations, congressional inquiries and civil suits related to its sale and marketing of opioid painkillers. The duo are also representing Teva Pharmaceuticals together with Houston’s Brigham Cannon and New York’s Henry DePippo in related DOJ and SEC investigations into alleged FCPA violations; they secured a civil settlement with the latter and a deferred prosecution agreement with the former. In terms of individuals, Mark HolscherJeff Sinek and Michael Shipley (all in Los Angeles) successfully defended, as co-counsel with a team from Morgan, Lewis & Bockius LLP, Eric Pulier against criminal proceedings initiated by the DOJ arising from fraud allegations relating to the sale of his company, ServiceMesh, to Computer Science Corporation; all charges were dropped. Other key team members include Chicago’s Asheesh Goel, Kim Nemirow and Elizabeth Hess and Washington DC’s Erica Williams. In 2018-2019, the team lost a number of individuals to the administration, including Robert Khuzami, Brian Benczkowski, John Lausch, and also William Barr, who was confirmed as US Attorney General in February 2019.