Siefert Associates has extensive experience in site characterizations, evaluating project needs, and identifying cost-effective, excavation support systems for complex infrastructure, commercial, and residential projects.  Whether it be a 30 foot tall excavation adjacent to an active railroad, interstate highway, or occupied building, Siefert Associates can select an appropriate excavation support system and prepare a comprehensive design best suited to the conditions and needs of the project. We routinely specify and design systems incorporating solider piles and lagging, sheet piles, soil nails, and secant piles that are either cantilevered or supported by internal bracing or anchors.We have excellent relations with many specialty contractors that regularly engage us to perform engineering services for excavation support systems in the metro-New York area.