Member of federal agency advisory boards (e.g. US Army Corps of Engineers): National Academy of Science Committees (Endangered Species, Marine Habitat Restoration); and national environmental organization boards (Environmental Defense Fund, Defenders of Wildlife, Environmental Law Institute).

Co-founder of several public interest and academic institutions: Lake Pontchartrain Basin Foundation, Committee to Restore Coastal Louisiana, Tulane Public Interest Law Foundation, Tulane Environmental Law Clinic, Tulane Environmental Law Society, Tulane Environment and Energy Law Journal, Tulane Institute for Water Law and Policy.

Principal in resolution of several Louisiana environmental controversies including: the Atchafalaya Floodway Project, see Martin Reuss, Designing the Bayous (Texas A&M, 2004); Lake Pontchartrain, see Houck et al.,To Restore the Lake (Greater New Orleans Expressway Commission, 1989); the Bayou Sauvage National Wildlife Refuge, see Errol Laborde, New Orleanian of the Year (Gambit, l987); and Gypsum Dumping, Freeport McMoran, see Houck, Down on the Batture (UMiss, 2012).

Briefs of amicus curiae:

Southeast Louisiana Flood Control Authority v Tennessee Pipeline, 2014 (public trust)

National Trust for Historic Preservation v Department of Veterans Affairs, 2010 (urban demolition)

Comer v Murphy Oil, 2010 (pollution damages)

Avenal v Louisiana, 2003 (oyster lease damages)

Shaunessy v PPG Industries, 1991 (marine pollution)

Cheramie v Plaisance, 1991 (barrier island damage, wrongful discharge)

Save Our Community v Reily, 1990 (wetland permitting)

Vieux Carre Property Owners v Brown, 1988 (waterfront permitting)