Wetland Studies and Solutions, Inc. (WSSI), a Davey Tree Company, is one of the Mid-Atlantic region’s leading environmental and cultural resource consulting firms. We have grown from a one-person wetland consulting firm in 1991 to more than 200 staff, and along the way have earned an excellent reputation in the industry, with regulators, and with our clients. WSSI provides expertise and experience for public and private sector clients to obtain the environmental approvals needed to create the built environment. GSA Schedule: #GS-10F-0273W WSSI’s NAICS codes include 541620, 541330, 541370, 541720, and 562910.