Chambers Review
Provided by Chambers
Chambers Guide to the USA
Antitrust - District of Columbia
Individual Editorial
Sonia Pfaffenroth is commended for her broad antitrust practice. She has notable strength in litigation and merger challenges.
Sonia Pfaffenroth
USA Guide 2026
Band 4 : Antitrust
Share profile
Lawyers profile
USA 2026
Lawyers profile | USA 2026: Antitrust
Sonia Pfaffenroth
Ranked in 1 Practice Areas
Band 4
About
Provided by Sonia Pfaffenroth
USA
Practice Areas
Sonia Kuester Pfaffenroth focuses her practice on helping clients address complex antitrust issues in the U.S. and globally. She rejoined the firm in 2017 from the Antitrust Division of the U.S. Department of Justice (DOJ) where she served most recently as Deputy Assistant Attorney General for Civil and Criminal Operations. In that role, Sonia was responsible for supervising both civil and criminal antitrust enforcement efforts, as well as the Division's work with antitrust and competition law enforcement agencies worldwide.
Strengths
Provided by Chambers
Slide 1 of 2
Sonia is a really remarkable attorney. She is very good at navigating other counsel and keeping the scope and the focus where it belongs.
Sonia is very smart, sharp and knowledgeable. She is committed, diligent and hard-working.
Slide 2 of 2
Sonia is personable and easy to work with, which has proven to be an asset in negotiation.
Sonia is a really remarkable attorney. She is very good at navigating other counsel and keeping the scope and the focus where it belongs.
Sonia is very smart, sharp and knowledgeable. She is committed, diligent and hard-working.
Sonia is personable and easy to work with, which has proven to be an asset in negotiation.
Discover other Lawyers at
Arnold & Porter
Provided by Chambers
Filter by
Band
California
Intellectual Property: Trademark, Copyright & Trade Secrets: Transactional
Colorado
Litigation: General Commercial
District of Columbia
Antitrust
20 of 171 results