Senior Geologist, Dru Nielson, logging a test boring at a Waste Water Treatment Plant.
© 2008 DCM/GeoEngineers.
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About Us - Professional Staff
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To view a brief biography for one of our professional staff, click on their name below.
David C. Mathy, Principal/Geotechnical Engineer
Robert A. Kahl, Senior 2/Geotechnical Engineer
Dru R. Nielson, Senior 2/Geologist
Marc M. Gelinas, Senior 2/Geotechnical Engineer
Brian R. Dodge, Project 2/Scientist
Robert C. Lanzafame, Staff 1/Civil Engineer
David Mathy
David Mathy is the Managing Principal at DCM/GeoEngineers. Dave received a Bachelor of Science degree in Civil Engineering from California State Polytechnic University at Pomona in 1976 and a Master of Science in Engineering degree from the University of California at Berkeley in 1979. Dave is a registered Civil and Geotechnical Engineer in the State of California. Over the past 25 years, Dave has completed a diverse range of geotechnical investigations and evaluations for DCM/GeoEngineers including: forensic analysis of landslide and earthquake damages; foundation underpinning and structure releveling; ground improvement and modification by compaction grouting, lens grouting and jet grouting; new structure foundations including footings, mats, drilled shafts and driven piles; deep excavation shoring and dewatering; and pipeline rehabilitation and new construction including tunneling and horizontal directional drilling. Dave has authored or co-authored over fifteen technical papers related to trenchless pipeline construction which have been presented at engineering conferences such as the Rapid Excavation and Tunneling Conference, ASCE Pipelines Conference, CWEA Conference, Northern California Pipe Users Group (PUG) Conferences, and several North American Society for Trenchless Technology No-Dig Conferences.
Robert Kahl
Robert Kahl is a Senior 2/Geotechnical Engineer at DCM/GeoEngineers. Rob received a Bachelor of Science degree in Civil Engineering from the University of California, Berkeley in 1981 and a Master of Science degree in Civil Engineering from the San Jose State University in 1994. Rob is a registered Civil and Geotechnical Engineer in the State of California. Over the past 20 years, Rob has completed geotechnical investigations and evaluations for a diverse range of project types and complexity including: water and waste water treatment plant facilities; pump stations; gravity and pressure pipelines; water tanks; roadways; parking garage structures; retaining walls; landslides; sand-based soccer fields, park development; city maintenance complex; retail, office, and commercial centers; and swim and water parks. Rob has extensive geotechnical engineering experience with pipeline projects including: pipelines installation by tunneling methods (e.g., microtunneling, bore and jack, horizontal directional drilling) and rehabilitation of existing pipelines (e.g., pipe bursting, cured-in-place pipe). Rob has co-authored technical papers related to microtunneling and other trenchless technologies which have been published in engineering conferences such as the North American Society for Trenchless Technology No-Dig Conference and the Northern California Pipe Users Group (PUG) Conference.
Dru Nielson
Dru Nielson is a Senior 2/Geologist at DCM/GeoEngineers. Dru received Bachelor (1986) and Master (1988) of Science degrees in Geology from Brigham Young University in Provo, Utah. Dru worked at the U.S. Geological Survey during the summer of 1986 and has been with DCM/GeoEngineers since 1989. Dru is a Registered Geologist and a Certified Engineering Geologist in the State of California, and is a member of the Association of Engineering Geologists (AEG), the Geologic Society of America (GSA), and the Geo-Institute of the American Society of Civil Engineers (ASCE). During the past 20 years, Dru has performed geologic studies identifying landslides, faults, and problematic soils, bedrock, and groundwater and evaluating their effect on construction and long-term performance of planned new development including water and waste water treatment facilities, bridges, pump stations, residential and commercial buildings, and many miles of conduits and pipelines (gravity and pressure) ranging up to 84 inches in diameter. Dru's most recent interests include exploring and characterizing geologic conditions for purposes of successful design of trenchless installations (i.e., tunneling, horizontal directional drilling, and pipe bursting). Dru has presented related technical papers at professional meetings hosted by GSA, AEG, ASCE, and the North American Society of Trenchless Technology (NASTT).
Marc Gelinas
Marc Gelinas is a Project 2/Geotechnical Engineer at DCM/GeoEngineers. Marc received a Bachelor of Applied Science degree in Civil Engineering from the University of Waterloo in 1996 and a Master of Applied Science degree in Civil Engineering from the University of Waterloo in 1999. Marc is a registered Civil and Geotechnical Engineer in the State of California and a registered Professional Engineer in the Province of Ontario, Canada. Since joining DCM/GeoEngineers in 1999, Marc has completed a diverse range of geotechnical investigations and evaluations including: installations of fiber optic conduits, gravity sewers and pressure pipelines using horizontal directional drilling, microtunneling, pilot-tube guided boring, auger boring, pipe bursting, pipe reaming, and open-cut trenching; construction of pump stations, clarifiers, storage basins, and other waste water treatment plant facilities; the construction of bridge, tank and commercial building foundations; ground improvement including lime treatment and various forms of grouting; slurry walls; and slope stability analyses for landslide areas.
Marc has authored or co-authored several technical papers related to horizontal directional drilling and other trenchless technology subjects which have been published in academic journals such as the American Society of Civil Engineers Journal of Infrastructure Systems, and presented at engineering conferences such as the American Society of Civil Engineers Pipeline Engineering and Construction Conference, the North American Society for Trenchless Technology (NASTT) No-Dig Conference, the Northern California Pipe Users Group (PUG) Conference, the International Symposium on Underground Infrastructure Research, and the Structural Engineers World Congress.
Brian Dodge
Brian Dodge is a Project 2/Scientist at DCM/GeoEngineers. Brian received a Bachelor of Science degree in Soil Resource Management from the University of California, Berkeley in 1978. Brian supervises and performs laboratory testing of engineering materials (soil and rock) for preconstruction and construction phases of geotechnical projects. Brian also performs or supervises construction inspections and testing for specification conformance for a diverse range of project types, including public works, commercial and residential engineering projects; and compiles the field and laboratory data into technical reports. During construction inspections, Brian has provided observation and assessments of construction activities including mass-fill placement, trench backfilling, bore and jack operations, shoring systems and trench stability. With over 24 years of hands-on experience in laboratory and construction project quality assurance and quality control, Brian is attentive to the timely needs of a project during construction.
Robert Lanzafame
Robert Lanzafame is a Staff 1/Civil Engineer at DCM/GeoEngineers. Robert assists in geotechnical field investigations including logging of test borings and test pits and CPT probes for public works pipeline and water and wastewater treatment plant design. Robert performs site history research into construction precedent, historic topographic map review and historic aerial photograph review. Robert assists Project and Senior Engineers in the preparation of geotechnical investigation reports and graphics. Robert also assists in the soils laboratory with physical property testing.
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About Us
Professional Staff