Atty. Daniel "Dan" Mensher
Daniel Mensher translates thorough preparation into courtroom success.Dan practices in Keller Rohrback’s nationally-recognized Complex Litigation Group with a focus on environmental cases and representing government entities in important litigation. He collaborates with his colleagues and clients to identify problems and craft creative, long-lasting solutions.
Profile Summary
About Daniel "Dan" Mensher at a glance
Daniel "Dan" Mensher is a class action and product liability attorney based in Seattle, Washington, practicing at Keller Rohrback LLP. Recognitions include Best Lawyers in America — Mass Tort Litigation / Class Actions - Plaintiffs (2026). Serands clients in Seattle, WA and the surrounding metropolitan area.
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About
- Daniel Mensher translates thorough preparation into courtroom success.Dan practices in Keller Rohrback’s nationally-recognized Complex Litigation Group with a focus on environmental cases and representing government entities in important litigation
- He collaborates with his colleagues and clients to identify problems and craft creative, long-lasting solutions
- Dan has litigated important environmental and consumer cases across the country in federal and state court
- He presently represents the State of Oregon in its case against Monsanto seeking to hold the corporate giant responsible for natural resource damages related to its sale and marketing of PCBs
- He is also part of the Keller Rohrback team representing more than 70 counties, cities, and tribes in the fight to hold drug manufacturers and other entities accountable for the opioid crisis
- Before joining the firm, Dan was an environmental law professor at Lewis & Clark Law School in Portland, Oregon, where he also litigated cases involving toxic waste, water pollution, and natural resource management
- He has sat on governmental advisory boards and helped to draft key environmental regulations in place today
- Dan uses his passion and experience to protect our environment and the people and communities that rely on clean air, water, and products
Practice Areas Explained
Daniel "Dan" Mensher's Areas of Practice
Each practice area below reflects the types of cases Daniel "Dan" Mensher handles, with a brief overview of what that area of law covers.
Daniel "Dan" Mensher is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in Washington →
Daniel "Dan" Mensher is one of 66,193 product liability attorneys indexed nationally. Browse product liability attorneys in Washington →
Jurisdictional Context
Why local counsel matters in Washington
Practicing law in Washington. Legal matters in Washington are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Seattle are typically filed in the local municipal court or the appropriate Washington state district court, depending on subject matter and amount in controversy. An attorney licensed in Washington brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Washington courts without local counsel or pro hac vice admission.
Looking for additional Washington attorneys? Browse all attorneys in Seattle or all attorneys in Washington.
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