SEA
, Inc. was formed in April 2002 to provide Consulting Structural Engineering services. Our staff consists of four structural engineers,
Greg Hannestad, PE, Mark Smith, PE SE, Brian Welch, PE SE, and Rob Maher, PE,  two with Master’s degrees in Structural Engineering, and a structural technician, Dave Maurer. Our staff averages 23 years experience each in design and construction.
  • Consulting Engineering for Architects
  • Structural Engineering for Homebuilders
  • Field Engineering for Contractors
  • Forensic Engineering for Owners
  • Forensic work for Insurance/Attorneys
  • Structural Surveys of existing schools
  • Analysis of existing structures
  • Design of Highway Bridges
  • Design of Box Culverts & Retaining Walls
  • Special Inspections to satisfy IBC2000
  • Renovations of historic buildings
  • Design of pedestrian walkways/bridges
  • Design of elementary/middle/high schools
  • Design of higher education facilities
  • Wood-framed Apartment buildings
  • Design of Cofferdams
  • Deep foundations - piling/caissons
  • Structural Steel design
  • Prestressed/post-tensioned concrete
  • Finite Element Analysis


Butterfly House, Sioux Falls, SD


River Centre, Sioux Falls, SD


Sioux Falls Fire Station 42