Beveridge & Diamond, P.C.
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Environmental boutique Beveridge & Diamond, P.C. is singled out for the ‘depth and breadth of its environmental bench,’ which can support a diverse roster of agriculture, chemical, retail, and technology sectors. The firm is adept at handling emerging issues such as PFAS liability, climate change, and plastic waste. Operating out of Washington DC, co-head John Cruden is well-versed in environmental and natural resources litigation, while from New York, co-head Daniel Krainin assists clients on alleged soil and groundwater contamination and natural resource damages. Operating from the DC office, Nessa Horewitch Coppinger has a solid track record of litigating multi-party federal and state statutory and common law claims, whereas James Slaughter is a key figure in mass tort, class action, and preemption litigation. Austin-based Maddie Boyer chiefly focuses on air permitting and litigation for the chemical manufacturing and petroleum refining sectors, and San Francisco’s Susan Smith concentrates on toxic tort defense. Katrina Krebs and Parker Moore, in New York and DC respectively, are also recommended.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Really, the go-to environmental litigation firm. In 2025, we greatly benefited from Beveridge & Diamond's CERCLA litigation expertise in a federal appellate matter, and their insight and knowledge base are unmatched.’
‘Justin Smith has been a superstar for us, and I can't strongly recommend him enough, especially for CERCLA and related litigation (nuisance, trespass, etc.). Dan Krainin's litigation strategy skills and environmental knowledge base have been invaluable.’
Key clients
- American Petroleum Institute
- BASF Corporation
Work highlights
Represents Evraz, the owner of an active steel mill and several historical properties within the site of Portland Harbor, a contaminated 12-mile stretch of the Willamette River.


