Northern Geotechnical Engineering, Inc. d.b.a. Terra Firma Testing (NGE-TFT) was incorporated in the State of Alaska following the merger of Northern Geotechnical Engineering and Terra Firma, Inc. on June 25, 2004. Prior to the merger, Northern Geotechnical Engineering operated as a sole proprietorship, founded in 2000 by Mr. Keith F. Mobley, P.E., that focused on geotechnical engineering in cold regions. Terra Firma, Inc. was established in 1998 by Mr. Ron J.P. Caron, C.E.T, as an Anchorage-based materials testing service certified to provide accredited laboratory materials testing, CoMET, and Quality Assurance/Quality Control (QA/QC) services in the State of Alaska.

Our field personnel provide a range of quality assurance Construction Site Materials Testing and Observation services before, during, and after construction. These services include on-site materials testing, observation and monitoring of materials during placement/construction, and evaluation of placed/constructed materials. Materials and structures typically covered by these services include earthwork, foundations, concrete, wood, masonry, structural steel, sprayed-on fireproofing, and asphalt pavement.

At NGE-TFT, we provide a wide-range of professional engineering, construction quality control/assurance, ICC Special Inspection, and laboratory testing services with an emphasis on value engineering and professionalism. Our staff of professional engineers and geologists is experienced in a wide range of subsurface exploration techniques and cold-region design and construction practices. Our staff maintains an outstanding relationship with exploration and construction contractors across Alaska enabling us to provide geotechnical engineering services tailored to specific project needs, while maintaining tight controls on cost, schedule, and performance.

We provide a wide-range of professional engineering services that include: subsurface exploration and monitoring; geotechnical, civil, and structural design; site and project feasibility evaluations; constructability assessments; cost analysis; and construction management.