The subsurface introduces unknowns and risks to any project. No two sites are the same. Soil conditions, rock and bedrock conditions, groundwater conditions, or underground obstructions vary from project to project, creating different sets of design and construction challenges. Our geotechnical, structural, foundation, and materials engineers understand how the subsurface affects and interacts with various types of buildings, buried structures, and their components. Through our diverse experience in design, investigation, and rehabilitation projects associated with underground construction, we are well-positioned to help our clients mitigate these inherent risks.


SGH's geotechnical and foundation engineering services include translating visual observations and field tests into realistic assessments of conditions; clear identification of risks and potential rewards when outlining options; designing structures or repairs; and coordinating with owners, designers, and contractors to ensure a practical solution. We can respond to a variety of geotechnical and foundation needs with our breadth of experience and professional skills. Our work includes design, investigation, and/or rehabilitation of the following:

  • Shallow and Deep Foundations, including Mat Foundations
  • Dynamically Loaded Foundations
  • Earth Retention Systems
  • Temporary and Permanent Excavation Support Systems
  • Slabs-on-Grade
  • Cut/fill slopes
  • Underpinning
  • Construction and Permanent Dewatering Systems
  • Groundwater Recharge Systems
  • Embankment Dams, Reservoirs, and Detention Basins
  • Tunnel Liners and Tunnel Waterproofing
  • Ground Improvement/Stabilization
  • Tremie Concrete Placement
  • Temporary Construction Works

We also offer the following geotechnical and foundation engineering services:

  • Construction Sequencing
  • Evaluation of Construction Impacts on Existing Structures
  • Pre-bid Assistance and Value Engineering
  • Geotechnical and Structural Instrumentation
  • Forensic Engineering and Litigation Support