Siefert Associates, LLC provided design services for Navillus MLJ JV in support of the rehabilitation of the approach arches of the...

In 2012, Siefert Associates, LLC provided construction engineering services to Halmar International and China Construction America Inc....

In October of 2020, Halmar International removed the existing KC Ramp deck superstructure, as part of the Kew Gardens Interchange...

In 2013 Siefert Associates, LLC provided construction engineering services to Tappan Zee Constructors, LLC for the construction of what...

In 2010, Siefert Associates, LLC completed work for the Roslyn Viaduct Bridge Project, a full replacement of the existing Rte. 25A...

Siefert Associates, LLC was awarded a contract by Atlantic Coast Dismantling to demolish the Wittpenn Bridge. The vertical-lift bridge...