About Us

Established in 2006, Rockridge Geotechnical is a certified Small Business in the State of California, a Small Local Emerging Business in the County of Alameda, as well as a Small Local Business Enterprise in the City of Oakland. With over 70 years of total combined experience in the geotechnical engineering field, Rockridge Geotechnical engineers are knowledgeable, professional, and experts in their field. 2016 marked the 10 year anniversary of this successful small business, and with a growing team and growing client base we are excited for the next 10 years to come.

 

 

cshields

Craig S. Shields, P.E., G.E., Mr. Shields is the founder and a Principal Engineer of Rockridge Geotechnical. He received a Bachelor of Science degree in Civil Engineering from the University of California, Berkeley in 1981 and a Master of Science in Geotechnical Engineering from the University of California, Berkeley in 1982.

 Mr. Shields has over 38 years of geotechnical engineering experience in Northern California for a variety of private and public projects. He has managed geotechnical engineering projects for low-rise buildings to high-rise towers, market-rate and affordable housing developments, as well as mixed-use, retail, commercial, and office developments. He has also performed geotechnical services for waterfront and harbor facilities, airports, light railways, slope repairs, quarry reclamation, municipal and regional parks, public and private schools, and institutional and public buildings.

Mr. Shields has developed design recommendations for deep and shallow foundations, ground improvement systems, deep excavations, slope stabilization, underpinning of existing structures, and temporary shoring and permanent retaining walls. He has performed forensic investigations, provided expert witness testimony, and performed peer reviews for numerous projects. He is instrumental in developing geotechnical recommendations that balance cost with performance and risk to the varying subsurface and project performance criteria. 

 

lliangLinda H.J. Liang, P.E., G.E, Ms. Liang is an Associate Engineer of Rockridge Geotechnical. She received a Bachelor of Science degree in Civil Engineering from the University of California, Berkeley in 1997 and a Master of Science degree in Geotechnical Engineering from the University of California, Berkeley in 1998.

Ms. Liang has over 20 years of experience leading and coordinating complex field investigations, developing geotechnical recommendations, and collaborating with design and construction team members and stakeholders from conceptual design through project completion. She has provided geotechnical services for both public and private sector clients throughout the greater San Francisco Bay Area, nationally and internationally. Her project experience included market-rate and affordable housing developments, public and private schools, commercial and office developments, park and sport facilities, public and institutional buildings, shoreline and waterfront structures, slope stabilization and landslide repairs. She had also provided geotechnical services for infrastructure projects, such as new roadways, parking structures, pipelines, levees, dams, and water treatment plants.

Ms. Liang has managed a diverse range of projects from single-story buildings to high-rise towers with multi-level basements; landfill closures and post-closure land use; preparing and reviewing Environmental Impact Reports; emergency response and repair of slope failures; and site development. She has designed and evaluated engineered slopes, landfill cover systems, shallow and deep foundations, ground improvement systems, underpinning, temporary shoring and permanent retaining walls. She applies her breath of geotechnical knowledge and diverse project experience to develop project solutions that are technically sound, cost effective, and constructable. 

 

lmedeirosLogan D. Medeiros, P.E., G.E., Mr. Medeiros is a Senior Engineer of Rockridge Geotechnical. He received a Bachelor of Science degree in Civil Engineering from California Polytechnic State University, San Luis Obispo in 2004, and a Master of Science degree in GeoEngineering from the University of California, Berkeley in 2007.

Mr. Medeiros has over 15 years of geotechnical engineering experience and provided project management, subsurface investigation, engineering design, and construction observation services for numerous projects throughout the greater San Francisco Bay Area and nationally. He has evaluated sites with complex subsurface conditions, such as soft soils, liquefiable soils, and unstable slopes. He has worked on projects for educational facilities, commercial developers, affordable and market-rate residential developers, government agencies, and litigation support.

Mr. Medeiros has developed design recommendations for slope stabilization, ground improvement systems, deep excavations, deep and shallow foundations, and temporary shoring and retaining walls. He has performed geologic hazard evaluations, site-specific ground motion studies, and site response analyses for liquefiable sites, as well as for public school projects successfully reviewed by the California Division of State Architect (DSA) and the California Geological Survey (CGS). His integrated expertise provides insights that help clients make informed decisions early in a project lifecycle. 

 

dmaffioliDarcie A. Maffioli, P.E., G.E., Ms. Maffioli is a Senior Project Engineer of Rockridge Geotechnical. She received a Bachelor of Science degree in Civil Engineering from California Polytechnic State University, San Luis Obispo in 2008, and a Master of Science degree in Civil Engineering from the University of California, Los Angeles in 2010.

Ms. Maffioli has provided project management, geotechnical investigation, and construction observation services for a variety of projects throughout Northern California. She has performed geotechnical investigations and studies to develop geotechnical recommendations for the design and construction of low-rise to high-rise residential and commercial developments, educational facilities, and affordable housing projects. She has provided geotechnical recommendations to mitigate geologic hazards such as liquefaction, lateral spreading, and unstable slopes. She has also participated in design optimization projects, feasibility studies, litigation, and peer reviews for complex geotechnical projects.

Her building experience includes developing geotechnical recommendations for the design and construction of new and retrofit structures and facilities. Her levee and dam experience includes performing assessments of geotechnical hazards, slope stability, seepage, and preparing reports reviewable by State and Federal agencies.

Ms. Maffioli has evaluated sites with complex subsurface conditions, including undocumented fill, weak and highly compressible soils, and potentially liquefiable soils. She has developed design recommendations for deep and shallow foundations, temporary shoring and retaining walls, and ground improvement systems. She has performed site-specific ground motion studies and site response analyses. She has also installed and assessed the performance of subsurface instrumentation such as inclinometers, extensometers, and piezometers.

 

claytonClayton J. Proto, P.E.,  Mr. Proto is a Senior Project Engineer of Rockridge Geotechnical. He received a Bachelor of Science degree in Civil Engineering from California Polytechnic State University, San Luis Obispo in 2011, and a Master of Science degree in Civil Engineer from the University of California, Davis in 2013.

Mr. Proto has provided construction observation, engineering analysis, project management, and geotechnical investigation services for a wide range of projects across the greater San Francisco Bay Area. He routinely coordinates geotechnical field investigations and excels at keeping projects on-budget and on-schedule. He has evaluated sites with complex subsurface conditions, such as sites with weak and highly compressible soils, liquefiable soils, lateral spreading, and unstable slopes. He has collaborated with teams for new construction projects, including waterfront developments, retail and commercial developments, office developments, and both affordable and market-rate residential developments, as well as seismic upgrade of existing structures for residential and commercial use. He has also evaluated foundation systems, assessed settlements, and performed site-specific ground motion studies for tall buildings (high-rise towers that are at least 40 stories).

Mr. Proto has performed extensive geotechnical engineering analyses, including detailed settlement assessments, static and dynamic slope stability, and selecting geotechnical parameters for the design of ground improvement systems, deep excavations, deep and shallow foundations, and temporary shoring and retaining walls. He has performed geologic hazard evaluations, site-specific ground motion studies, and site response analyses for sites susceptible to soil liquefaction.

 

katieKatie Dickinson, Ms. Dickinson is a Project Engineer and Field Operations Manager of Rockridge Geotechnical, Inc. She received a Bachelor of Science degree in Geological Engineering from the University of Nevada, Reno in 2012.

Ms. Dickinson has directed geotechnical field investigations, provided geotechnical observation and testing services during construction, and managed geotechnical investigation and construction projects throughout the greater San Francisco Bay Area. As a Field Operations Manager, Ms. Dickinson has also trained field staff(s) to successfully perform geotechnical investigations and provide construction observations and testing services. She has supervised the firms’ field engineers and technicians and assigns the appropriate field staff(s) to provide construction observation and testing services.

Ms. Dickinson has provided construction services for a wide range of projects, including site grading and fill placement; mass grading with thick fill slopes and keyways; installation of shallow foundations and deep foundations, such as drilled piers and driven steel and concrete piles; micropiles and helical mini-piles; proprietary deep foundations such as auger-cast-piles and torque-down piles; ground improvement systems such as permeation grouting, compaction grouting, and drilled-displacement sand-cement columns; temporary shoring and permanent retaining walls, including installation of tiebacks and soil nails. 

 

qfloresQuintin A. Flores, P.E., Mr. Flores is a Project Engineer for Rockridge Geotechnical. He received a Bachelor of Science degree in Civil Engineering from California Polytechnic State University, San Luis Obispo in 2015, and a Master of Science degree in GeoEngineering from the University of California, Berkeley in 2016.

Mr. Flores has provided construction observation, engineering analysis, project management, and geotechnical investigation services for a wide range of projects across the greater San Francisco Bay Area. He has performed geotechnical studies and investigations to develop geotechnical recommendations for the design and construction of low-rise to high-rise residential and commercial development. He has worked on projects for commercial developers, affordable and market-rate residential developments, and projects with deep excavations.

Mr. Flores has designed and prepared design submittals for drilled displacement sand-cement column ground improvement systems to mitigate the effects of weak, highly compressible or potentially liquefiable soils on proposed developments, and performed geotechnical engineering analyses for ground settlement, shallow and deep foundation design capacities, shoring design, and retaining wall designs. He also has extensive experience in geotechnical construction observations, including site grading and fill placement, installation of shallow and deep foundations, installation of proprietary deep foundations, ground improvements, and installation of temporary shoring, including tiebacks and soil nails.

 

dlandkamerDevin E. Landkamer, Ms. Landkamer is a Project Engineer of Rockridge Geotechnical. She received a Bachelor of Science degree in Civil Engineering with a minor in Psychology from California Polytechnic State University, San Luis Obispo in 2015.

Ms. Landkamer has provided construction observation, engineering analysis, project management, and geotechnical investigation services for a wide range of projects across the greater San Francisco Bay Area. She has performed geotechnical studies and investigations to develop geotechnical recommendations for the design and construction of low-rise to high-rise residential and mixed-use developments, public and private schools, office development, multi-level basements, sports facilities, parking structures, and affordable housing projects.

Ms. Landkamer has performed geotechnical engineering analyses for the design and construction of shallow foundations, deep foundations, and temporary shoring. She also has extensive experience in geotechnical construction observations, including site grading, fill placement, and utility trench backfill. She has observed the installation of shallow foundations, installation of deep foundations, such as micropiles, drilled piers and driven steel and concrete piles, helical mini-piles, and proprietary deep foundations such as auger-cast-piles and torque-down piles, installation of ground improvement elements, such as drilled-displacement sand-cement columns and permeation grouting, and installation of shoring, including tiebacks and soil nails.

 

krystianKrystian Samlik, P.E., Mr. Samlik is a Project Engineer of Rockridge Geotechnical. He received a Bachelor of Science degree and a Master of Science degree in Civil Engineering from California Polytechnic State University, San Luis Obispo in 2012 and 2013, respectively.

Mr. Samlik has provided construction observation, engineering analysis, project management, and geotechnical investigation services for a wide range of projects across the greater San Francisco Bay Area. He has performed geotechnical investigations and studies to develop geotechnical recommendations for the design and construction of low-rise to high-rise residential and commercial developments and for projects with deep excavations.

Mr. Samlik has evaluated slope stability for shorelines and embankments, designed and prepared design submittals for drilled displacement sand-cement column ground improvement systems to mitigate the effects of weak, highly compressible, or potentially liquefiable soils on proposed developments, and performed geotechnical engineering analyses for ground settlement, shallow and deep foundation design capacities, shoring design, and retaining wall designs. He also has extensive experience in geotechnical construction observations, including site grading and fill placement, installation of shallow and deep foundations, installation of proprietary deep foundations, ground improvements, and installation of temporary shoring, tiebacks, and soil nails.