Bob Alessi serves as the Global Vice Chair of DLA Piper's Energy Sector. He is regularly called upon by domestic and international clients to handle their most significant environmental and energy matters, be they project development, regulatory, major transactions, compliance, defense of government enforcement actions or judicial and administrative trials and appellate litigation.

Drawing on his scientific background, he has been the lead counsel on several matters of national and international significance, including representing the entity charged with planning and coordinating the rebuilding and revitalization of the World Trade Center and Lower Manhattan in the aftermath of 9/11, on environmental and energy regulatory and project development matters, and the Kingdom of Saudi Arabia.

He has led project development, regulatory, transactional and compliance matters for electric generation, transmission and distribution providers, liquefied natural gas facility developers, oil and gas companies (upstream, midstream, and downstream), renewable energy companies, water utilities, pipeline entities, industrial manufacturers, financial institutions, railroads, private equity firms, automobile manufacturers, state and local governmental authorities, mining operators, sports organizations, telecommunication providers, and solid and hazardous waste disposal facilities and transporters. These matters concerned and included the Natural Gas Act, Clean Air Act, Clean Water Act, National Environmental Policy Act, Superfund, Coastal Zone Management Act, Safe Drinking Water Act, Oil Pollution Act, Endangered Species Act, Resource Conservation and Recovery Act, state and international oil, minerals and gas acts, climate change, natural resource damages, hydraulic fracturing, electromagnetic fields, European Union environmental and energy laws and the attendant land use and public policy components.

Bob represents Fortune 500 companies, private equity firms, governmental entities and cultural institutions and often appears on behalf of clients in federal and state trial and appellate courts and in administrative tribunals where he has successfully tried and argued numerous matters. In 2012 he secured victories for major energy companies in the United States Court of Appeals for the Second Circuit and the District of Columbia which were profiled in the American Lawyer Litigation Daily, New York Law Journal and Law 360 and reported in the New York Times and Wall Street Journal.

His general civil litigation practice encompasses a wide variety of commercial matters in state and federal trial and appellate courts.