Ghillaine is a member of the firm's Government Investigations and White Collar Litigation practice group, and Co-Head of the Broker-Dealer practice for the Financial Institutions Industry Team. She focuses her practice on government and securities regulatory investigations, financial services litigation, commercial litigation and corporate compliance. Drawing on her experience in government service and private practice, Ghillaine regularly represents corporations and individuals in investigations conducted by the Securities & Exchange Commission, the Department of Justice, the Financial Industry Regulatory Authority and other government and regulatory agencies. Ghillaine has successfully defended several high profile SEC investigations and enforcement proceedings involving a wide range of significant issues, including insider trading, accounting fraud, market manipulation and broker-dealer sales practice violations. Prior to entering private practice, Ghillaine was a Branch Chief and Staff Attorney in the New York Regional Office of the Securities & Exchange Commission's Division of Enforcement, where she investigated and litigated a wide range of securities enforcement matters.

Ghillaine also represents clients in complex financial services and commercial litigations matters, in both federal and state courts. She has achieved favorable outcomes in cases involving fraud, breach of contract, breach of fiduciary duty, misrepresentation and tortious interference. She has also successfully defended clients in large scale arbitration proceedings, both through the Financial Industry Regulatory Authority and the American Arbitration Association.

Ghillaine is a frequent speaker on issues concerning securities law, government investigations and corporate compliance.