Brook helps his clients to navigate domestic and international climate change programs, develop renewable energy projects, and generate carbon offsets.  He helps his clients to negotiate, structure, and implement transactions related to carbon offsets and renewable energy, and works with clients during all phases of renewable energy and carbon offset project development.  Brook also represents clients during complex environmental litigation, having served as litigation and appellate counsel during dozens of proceedings in state and federal courts across the country. He serves as Managing Principal of B&D's Boston office.

Prior to joining the firm, Brook was an associate in the environmental department of a large international law firm.

Brook served as a law clerk at the U.S. Department of Justice, Environment and Natural Resources Division, where he worked on a range of legal issues arising under federal environmental law, including Clean Water Act (CWA) wetlands jurisdiction, liability under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Resource Conservation and Recovery Act (RCRA) compliance, and National Environmental Policy Act (NEPA) requirements.

Brook also maintains an active pro bono practice, counseling individuals and non-profit entities on a range of legal matters in Massachusetts.