Hannah Posen

HANNAH POSEN focuses her practice on defending and advising clients on a wide range of environmental matters, including civil and criminal enforcement actions, regulatory compliance, civil litigation, and environmental aspects of transactions. Hannah is particularly focused on matters arising under the Clean Air Act and Clean Water Act and she has represented and advised various clients in state and federal enforcement proceedings involving alleged violations relating to air emissions and effluent discharges.

Hannah has extensive experience conducting internal investigations for manufacturing companies relating to Clean Air Act and Clean Water Act compliance issues. Hannah has also defended multiple automotive sector clients against Clean Air Act enforcement actions. Hannah’s litigation experience includes defending a company in a citizen suit and criminal investigation under the Clean Water Act for alleged effluent discharge violations and defending companies against environmental state-law claims.