multi-family dwellings, multifamily apartment buildings, commercial buildings, additions and remodeling, and hillside construction engineering. S2NA also delivers seismic design, soft-story and unreinforced masonry retrofitting, seismic isolation, and earth retaining and shoring system design. Additional offerings cover expedited fire rebuild projects, restoration and reconstruction of historical buildings, and design of tensile membrane and heavy engineering structures such as marine and underground works. The firm supports project teams during construction with technical consulting to help ensure designs are implemented as intended.