Siefert Associates, LLC - Construction Engineers


The Premier Construction Engineering Firm in the NYC-Metro Area -- Professional, Capable and Dedicated.

We are defined and live by our Core Values of Honesty, Integrity and Balance in our work & family life.


News and Events for Siefert Associates, LLC
  • Awarded a contract to provide Crane Plans and Rigging Designs at Columbia University's Manhattanville Redevelopment Phase 2 for the Largest Slurry Wall project in the USA, for EE Cruz Inc.
  • Performed a Peer Review for Marino Crane, Division of Barnhart Inc, for a cutting edge Accelerated Bridge Construction (ABC) project in Hyde Park, MA, with the successful heavy haul and installation of the River Street Bridge occurring on April 15, 2012. Reference the NY Times article on the project here.
  • Siefert Associates is Chosen as team member with Kiewit, Skanska, and Weeks for the new Hudson River Crossing
  • Awarded a contract by Barnhart at Electric Boat in Groton, CT for a 330 Ton Crane rehabilitation.
  • Engineered the successful installation of a temporary deck and floorbeam system at Franklin Square Bridge on the Manhattan Approach of the Brooklyn Bridge for Koch Skanska.
  • Temporary Ramp 7A Bridge designed by SALLC at the Alexander Hamilton Bridge for CCA Halmar was successfully opened to traffic.

For a list of select Siefert Associates, LLC. Projects, please visit our Projects Page



The Goal of our organization is to develop high quality results for our clients by applying the varied experiences and creative skills of our Professional Staff to the construction challenges of each job. 

Our Structural, Civil and Geo-Technical Engineers along with our knowledgeable CAD Operators and Support Staff are capable of combining their Construction savvy with modern Engineering innovations to produce the most effective solutions in a timely fashion and at reasonable costs.

Our Specialty is developing working drawings and calculations tailored to the preferred means and methods of contractors on heavy and highway, railroad, power generation, utility and marine projects.  We are proud of our client relationships and realize our success is based on the collaborative, respectful rapport we've established, working together on numerous challenging projects.

Our main office is located in Central CT with current projects primarily in the Northeast United States.

rev. April 2012