Siefert Associates, LLC provides unparalleled structural engineering services to contractors and project owners for the construction of temporary and permanent trestle bridge designs.  Our technically skilled teams of professional structural and geotechnical engineers as well as experienced drafters focus on the suc- cess of each project. Siefert Associates, LLC highly qualified engineers work collaboratively to deliver the best design tailored to the preferred means and methods of our clients. Over the past 15 years, Siefert Asso- ciates has completed several extremely technical trestle bridge designs, all on time and within budget.