With four licensed Structural Engineers on staff, and the support of an experienced technical staff, Willett, Hofmann & Associates, Inc. Structural Engineering Department can provide structural engineering services for projects of any size or complexity. WHA provides structural engineering services for new construction, rehabilitation and restoration of highway and railroad bridges; new construction, renovation and additions for building structural systems; existing structure evaluation reports and load rating analysis for both bridges and buildings; and construction engineering for projects of various sizes and complexities.