Sirena Castillo is an associate with the Litigation division in the Los Angeles office. Her practice focuses on business and commercial litigation. Ms. Castillo has represented a wide variety of clients in state and federal courts, including clients in insurance, healthcare, and banking industries. She has experience defending nationwide consumer class actions and unfair competition actions.
Ms. Castillo has experience advising and defending entities in a variety of white collar criminal matters, regulatory enforcement matters, and internal investigations. Her white collar defense practice includes the representation of corporations at all phases of government investigations, including responding to grand jury subpoenas and civil investigative demands. Ms. Castillo also conducts internal investigations for corporations in response to allegations of misconduct or in response to government inquiries.
Prior to joining Manatt, Ms. Castillo was an import policy analyst with the Department of Commerce's International Trade Administration, where, as a part of the Antidumping, and Countervailing Duty Petition Counseling and Analysis Unit, she advised U.S. industries and assisted in the initiation of petitions to address violations of U.S. unfair trade laws. Ms. Castillo also served as a policy advisor to the Acting Assistant Secretary for Import Administration, the head of the International Trade Administration's lead unit on enforcing trade laws and agreements regarding imports. She also served as a Judicial Extern for the Hon. Dale S. Fischer in the United States District Court for the Central District of California.
