Siefert Associates aided in the erection of the new Nassau 1 Interlocking east of Merillon Station Garden City as part of the third track...

In April of 2020 Skanska-Walsh J.V. launched the first of two temporary bridges used during construction of the new LaGuardia Airport in...

Siefert Associates, LLC is continuing to work with Skanska USA Civil to provide construction engineering services related to the barrier...

Congratulations to Siefert Associates' Thomas Orszulak, geotechnical engineer extraordinaire, and his wife Krista on the birth of their...

Siefert Associates, LLC remains operational, delivering 110% efficiency working from home for the 5th week in a row! Everyone at Siefert...

Siefert Associates, LLC prepared working drawings for Halmar International, LLC for the demolition of Bridge 6 over the Union Turnpike in...