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Matthew S. Sonnichsen
Associate Attorney

Practices and Industries

Insurance Coverage
WC and Liability Claims


JD, University of Idaho College of Law, Moscow, Idaho – ‘07

BA, History, Politics & Economics, The College of Idaho – ‘04

Admitted to Practice


Mr. Sonnichsen graduated from the University of Idaho’s College of Law in 2007 where his studies included course concentrations in environmental policy and administrative law. 

Mr. Sonnichsen’s practice is devoted principally to construction, corporate and environmental matters.  He services two of the firm’s retainer clients, an ENR top-50 environmental remediation and construction company and a robotics manufacturer engaged in the business of dismantling and decommissioning nuclear facilities in the U.S. and abroad.  Mr. Sonnichsen’s duties for these clients include routine contact review, litigation management, corporate compliance, and environmental compliance.

Previously, Mr. Sonnichsen was a staff attorney with Envirocon, Inc., a remediation and construction company doing business throughout the U.S.  Mr. Sonnichsen has successfully represented Envirocon on employment matters and in administrative matters involving regulatory compliance.  He is a co-drafter of Envirocon’s current DOT and State Transportation Compliance Manual and other compliance documents. 

During his tenure with Envirocon, Mr. Sonnichsen supervised outside counsel engaged in contract and insurance defense work to control costs and ensure the success of those efforts.

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