Daniel Lanier

Senior Principal and President of GEMS

For more than 24 years, Dan has focused on marine geology and offshore geoscience. In addition to his administrative role as President, Dan interprets high-resolution and three-dimensional seismic data, conducts geotechnical analyses of soil borings, and jumbo piston cores, and integrates this information to support placement of deep-water production field architecture. He is adept at managing project teams, collaborating with clients, and monitoring projects’ budgets, timing, and quality. 


Kimberly Faulk

Principal Marine Archaeologist 

Kim is a marine archaeologist with more than 23 years of experience supporting the oil and gas industry. She interprets high-resolution conventional and AUV geophysical data and historical data. In addition, Kim conducts a wide array of marine investigations, including archaeological excavation and assessments, and is adept at offshore operations, logistics, and project management. She has worked on sites from Maine to Alaska, providing dive support, excavation, conservation, and archaeological interpretations of submerged cultural resources. Her experience includes shallow water survey and interpretation in addition to deep-water identification and excavation of significant shipwrecks. Kim is a Fellow of the Society for Underwater Technology (SUT) and a member of SUT-US’s executive committee. 


John Dobias, PE

Principal Engineer 

John is an engineer with more than 20 years of experience in the offshore geotechnical engineering field. John leads project teams, conducts and supervises geotechnical interpretations, designs subsea foundations, and manages reporting. During offshore investigations, he works with geotechnical drilling and sampling equipment; develops new equipment and testing methods in the different soil and geology types in both shallow and deep-water environments; and manages installation of subsea foundations, including suction piles, mudmats, and driven piles. He designs and analyses structures including fixed platform piles, mudmats, mooring piles, and pipelines. Jon often addresses pipeline routing, site investigation planning, and integrated geotechnical-geologic studies. He is a member of the American Society of Civil Engineers. 


Chris Madere, PG, MBA

Principal Geologist 

Chris is a geologist with more than 24 years of experience leading and managing projects and proposals in the offshore geohazards industry.  He interprets two- and three-dimensional seismic and high‑resolution geophysical data for geohazard assessments and site characterization, geologic modeling, pipeline planning studies, subsea field development assessments, mooring assessments, and integrated geological and geotechnical studies.  Chris has experience across the Gulf of Mexico, US east coast, Caribbean Sea offshore Trinidad & Tobago, eastern Mediterranean Sea, West and East Africa, and the northwest shelf of Australia.  He is an active member of the Houston Geological Society and American Association of Petroleum Geologists.


Erin Janes

Principal Geoscientist 

Erin is a geoscientist with more than 24 years of experience in offshore geohazard assessments for the oil and gas industry. She is experienced in interpreting two- and three-dimensional seismic data and high-resolution geophysical data sets to perform shallow geologic modeling, shallow hazards assessments, and benthic community analyses. In addition, Erin handles pipeline planning studies, integrated geohazard and geotechnical studies, mooring assessments, and project management. She has direct project experience throughout the Gulf of Mexico and has led or worked on numerous offshore projects along the northwest shelf of Australia, West Africa, and the Caribbean.

Logan Brant

Logan Brant, PhD, PE 

Principal Engineer 

Logan is an engineer based in Texas with more than 18 years of professional experience focused on geotechnical engineering. His experience includes geohazard mitigation, slope stability analysis, ground improvement engineering, foundation design, offshore geotechnics, and geotechnical investigation. Clients turn to him to conduct complex onshore, nearshore, and offshore geotechnical investigations; provide engineering and design support; support field inspection; and serve as client technical representation. Logan’s field experience offshore includes projects in Mozambique, Cote d'Ivoire, and British Columbia, Canada. 


Tom Neurauter, PhD, PG

Senior Marine Geologist

Tom is a marine geologist with more than 46 years of experience acquiring, interpreting, and integrating geophysical, geological, and other remote sensing data, most often for the oil and gas and wind farm industries. His responsibilities include project management, business development, data interpretation, geologic assessment, and report preparation. He interprets and reports on geohazard investigations using three-dimensional data volumes and conventional analog and two-dimensional datasets. He has worked on many projects in the Gulf of Mexico, Alaska, Trinidad, Ecuador, the Philippines, Nigeria, Angola, Caspian Sea, Brazil, Australia, Malaysia, Indonesia, China, Eastern Mediterranean, and Egypt. Tom has presented papers on seabed and near-surface geologic processes and stratigraphy and is a member of the American Association of Petroleum Geologists and the Society of Exploration Geophysicists. 


John Hoffman, PG

Senior Geologist

John is a geologist with more than 40 years of experience in marine geology focusing on geohazards assessments for oil and gas clients. He offers clients expertise in conventional high-resolution geophysical and two- and three-dimensional seismic data, ROV target investigations, geophysical and geotechnical offshore operations, logistics, offshore QA/QC, project management, and geohazards assessments. He has worked at offshore sites throughout North America, South America, China, Southeast Asia, the Middle East, and the Caribbean Sea. John’s experience also includes shallow- and deep-water surveys for pipeline route design, production platform design, geochemical, geotechnical, and environmental sampling, and ROV biological surveys. 


Jeff Dingler, PhD

Senior Geoscientist 

Jeff is an offshore geohazards specialist and geophysicist with more than 16 years of experience supporting the oil and gas industry. His specialties include seismology, petroleum geology, geophysical operations, and surveying.


Ben Belgarde 

Senior Professional Geoscientist 

Ben is a geoscientist who specializes in integrating geologic and geophysical datasets to conduct subsurface characterizations and geohazards assessments. He brings more than 15 years of experience working for oil and gas operators. He applies geologic concepts to enhance subsurface understanding across a diverse range of geologic settings, teams, roles, regulatory requirements, standards, and stakeholders. In addition to his experience managing projects and teams, he is adept at seismic interpretation, site investigations, geohazard assessments, geophysical and geotechnical data acquisition programs, and environmental baseline studies. 


Lauren Shultz

Professional Marine Archaeologist 

Lauren is a marine archaeologist and GIS specialist who focuses on island, coastal, and underwater sites in the Caribbean, Pacific, and Mediterranean. She has experience in artifact conservation, laboratory management, data analysis, and archaeological and oceanographic assessments using GIS. As a marine archaeologist, she provides historic data interpretations, interprets high-resolution conventional and AUV geophysical data for archaeological assessments, and handles offshore survey data interpretation and QA/QC for oil and gas and renewables projects. In her GIS role, she provides ArcGIS and AutoCAD deliverables, works with SSDM-compliant geodatabases, manages large-scale databases, and supports pipeline routing. 

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Eduardo Carrillo, PhD 

Professional Geoscientist 

Eduardo specializes in geological engineering, with more than 23 years of field and desktop experience in Quaternary geology, external geodynamics, structural geology, neotechtonics, and fluvial geomorphology. A geohazard specialist, he often addresses active faults and tectonic-related processes, detection and classification of landslides, earthquake geology, seismic hazards, pipeline hazards, rock mass characterization, and geology to support oil and gas exploration. Eduardo has authored and coauthored more than 20 peer-reviewed scientific papers focused on seismic hazard assessment, paleoseismology, paleotsunamis, geomorphology, and regional structural geology. He has also helped develop national and international environmental risk policies as an advisor of the Venezuelan Academy of Physics, Mathematics, and Natural Sciences and as a member of the UNESCO Teamwork for the Study of South American Glaciers. 


Chelcy Berkey

Project Professional Geoscientist 

Chelcy is a marine geoscientist with extensive experience interpreting geophysical data; performing site, pipeline-route, and post-hurricane pipeline assessments; handling nautical charting; and conducting offshore surveys and data QA/QC. At GEMS, she conducts two- and three-dimensional geophysical site assessments, subsea field-development assessments, integrated geological and geotechnical studies, and reporting. She also has experience acting as as onboard client representative and data interpreter for various projects in the Gulf of Mexico and Eastern Africa. Chelcy brings offshore experience working with conventional and AUV side-scan sonar, sub-bottom profiler, multibeam bathymetry, and magnetometer data. 


Kelly Bates

Project Professional Geoscientist 

Kelly is a marine geoscientist with more than 11 years of experience in the oil and gas and wind farm industries, specializing in shallow hazards, riserless drilling monitoring, integrated development studies, and survey work. She offers clients the benefit of her experience with integrated field-development studies, shallow hazards, seep campaigns, and offshore geotechnical work. She has worked on projects in the Gulf of Mexico and the US and Canadian Atlantic, as well as in Trinidad, Colombia, and the Caspian Sea. 


Justin Tiffany, PG 

Project Geologist

Justin is a geologist with more than 10 years of experience investigating and characterizing offshore geohazards for the oil and gas and wind farm industries. He focuses on high-resolution geophysical and seismic data interpretation, geohazard identification and mitigation, and ground modeling and site characterization; this work often supports the planning of offshore wells, pipelines, wind turbine generators, and associated foundations. Justin has experience across the Gulf of Mexico, the US East Coast, Alaska, Brazil, Guyana, India, and West Africa. 


Sola Komolafe, PhD, PE 


Sola is a geotechnical engineer with expertise in offshore geotechnical site investigation, offshore geotechics, offshore deep foundations, and soil characterization in support of the oil and gas and wind farm industries. She conducts offshore and onshore laboratory texting, desktop studies, data interpretation, foundation analysis and design, and reporting of data. Her research has addressed structural and geotechnical engineering of foundations, as well as post-hurricane investigations. 

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Andrey Rudanets, PE 

Senior Staff Engineer 

Andrey is an engineer who specializes in onshore and offshore geotechnical site investigations, geotechnical site characterization, and foundation design. Many of his projects are related to the oil and gas industry, industrial sites, and offshore wind farm projects. He also offers experience with project management, focusing on performance, budget development and tracking, and subcontractor management. 


Shiyuan Li, PhD 

Senior Staff Geoscientist 

Shiyuan focuses in geotechnical engineering and soil and rock dynamics. He brings technical acumen in advanced geotechnical laboratory testing, including resonant column testing, torsional shear testing, static and cyclic triaxial testing, bender element testing, hollow cylinder torsional shear testing, and ring shear testing. His work often supports offshore geotechnics projects, geotechnical investigations, slope stability analyses, and geohazard mitigation projects. 


Chrissy Wanjohi

Business Analyst 

Chrissy brings more than 10 years of experience in accounting and finance in the oil and gas industry. She manages all accounting, finance, and administrative functions. 

Dan Warren

Senior Maritime Archaeologist

Dan is a maritime and terrestrial archaeologist who leads multidisciplinary teams on logistically complex offshore projects. His work addresses many kinds of projects and sites, including documenting deep-water shipwreck sites, conducting acoustic remote sensing of offshore development areas, and mapping cultural resources in marine settings to delineate existing sites and document new discoveries. His expertise includes marine geophysical and visual remote sensing analyses, archaeological excavation, Section 106 compliance, material culture analyses, metal detection, public outreach, and mentoring.

Sean Callihan

Project Professional Geoscientist 

Sean Callihan is a geoscientist who focuses on shallow hazards and development work, He has experience collecting, processing, and interpreting a wide range of geophysical datasets for mining prospect location, identification, and hazard analysis. He has also worked as an on-site geologist for geotechnical drilling projects, where he was responsible for logging boreholes and collecting samples per ASTM International standards. 

Debra Adams

Senior Designer 

Debra Adams is the lead AutoCAD operator at GEMS. She has 25 years of experience working in the oil and gas industry. Her specialties include database management, pipeline design and shallow hazard survey mapping. 


Danny Seamount

Senior Designer

Danny is a GIS specialist with more than two decades of experience in geomatics. He specializes in hydrographic surveying. With a broad range of expertise, including large-scale projects in the offshore wind, oil and gas, and NOAA industries, he has worked in the Arctic in Alaska, the Gulf of Mexico, and the Red Sea off the coast of Saudi Arabia. In addition to his hands-on experience, Daniel has expertise as a GIS trainer. 

Collaborating Geosyntec Geohazards Practitioner


Rodolfo Sancio, PhD, PE, D.GE 

Senior Principal Geotechnical Engineer 

Rodolfo is a geotechnical engineer based in Texas with more than 20 years of experience focused on geohazard management, geotechnical site investigations, site development and ground improvement solutions, and foundation analyses for large industrial facilities and civil construction. His practice focuses on onshore and offshore projects for the upstream and midstream oil and gas and petrochemical industry. This requires the implementation of his combined knowledge and experience on soil and rock mechanics for geotechnical characterization and analyses, geotechnical earthquake engineering, engineering applications of geomorphology, and hazard, vulnerability, and risk mitigation.