Junhan Li

Junhan Li is a Staff Engineer at Geo-Engineering Solutions, Inc., with over two years of hands-on experience in geotechnical engineering.

He is actively involved in geotechnical site investigations, including drilling, test pits, and site reconnaissance. He regularly prepares technical documentation, including engineering reports, field logs, and visual aids that support design and construction teams.

Johnathon Thacker

Field Technician, Geo-Engineering Solutions, Inc.

Johnathon Thacker is a Field Technician at Geo-Engineering Solutions, Inc., with over 6 years of experience in materials testing in both laboratory and field settings across California and Arizona.

His expertise encompasses earthwork and asphalt projects, ensuring high standards of quality and compliance.

Russell Thacker, GE, CEG

Senior Technician

Russell Thacker is a Senior Engineering Technician at Geo-Engineering Solutions, Inc., with over 35 years of experience in materials testing services for asphalt and earthwork projects across California. His extensive background ensures exceptional problem-solving capabilities and precision in project execution. As our most experienced engineering technician, we rely on Russ to be a mentor to our younger engineers, geologists and technicians. Russ is adept at teaching contractors as well as young professionals about the practical side of earthwork construction and testing.

In his spare time, Russ contributes back to the community by coaching softball in the East Bay.

Dylan Lynch

Field Technician, Geo-Engineering Solutions, Inc

Dylan Lynch is a Field Technician at Geo-Engineering Solutions, Inc., bringing over two years of experience in materials testing within laboratory and field settings across California. His background in construction, along with his experience utilizing a wide range of tools and construction equipment, provides him with a strong practical foundation to support earthwork and asphalt projects. Dylan’s diverse skill set—including problem-solving, effective communication, and interpersonal abilities—enables him to collaborate seamlessly with teams and clients, ensuring the successful execution of various construction initiatives.

Dylan leverages his hands-on experience and technical skills to support the company’s mission of delivering cost-effective, high-quality solutions. His work directly contributes to providing superior services and finding innovative solutions that meet both the technical and fiscal needs of each project.

Outside of work, Dylan enjoys spending time with friends and family and has a passion for sports.

Colin Frost, PE

Project Engineer, Geo-Engineering Solutions, Inc.

As a project engineer at Geo-Engineering Solutions, Colin has gained experience on a variety of project types, such as public schools, residential and industrial developments, athletic field improvements, and photovoltaic structures. His work experience includes construction observation, leading geotechnical investigations, performing and managing laboratory testing, engineering analysis, and geotechnical report writing. Colin is proficient in various engineering calculations, including consolidation settlement, liquefaction analysis, shallow and deep foundation capacity, and ground motion hazard analysis.

Outside of work, Colin enjoys spending time with family and playing music with friends.

Christine So

Office Manager, Geo-Engineering Solutions, Inc

As Office Manager at Geo-Engineering Solutions,Christine is dedicated to ensuring the smooth, efficient operation of Geo-Engineering Solutions, so the team of engineers, geologists, and field teams can focus on delivering high-quality geotechnical solutions. With a strong background in office administration, Christine plays a pivotal role in supporting both the technical and strategic sides of the company.

Christine’s work spans a broad range of responsibilities—from managing day-to-day operations, HR, and accounting. She works closely with project managers and technical teams to ensure they have the administrative support and resources they need to stay on track. Christine takes pride in creating a structured, responsive, and professional office environment where collaboration and efficiency can thrive. She is passionate about fostering a collaborative, well-organized workplace where communication flows freely and the team can thrive in tackling the complex challenges of geotechnical engineering.

Outside of work, Christine enjoys discovering new restaurants and spending time with friends and family.

Corey T. Dare, PE, GE

Principal Engineer, Geo-Engineering Solutions, Inc

As a Principal Geotechnical Engineer at Geo-Engineering Solutions, Mr. Dare brings over 40 years of practical experience providing geotechnical engineering services to both public and private sector clients throughout the San Francisco Bay Area and Northern California He has a wide range of project experience from the pre-design through construction phases of projects for project types including K-12 educational facilities, public and private colleges and universities, hospitals and medical office buildings, government, commercial, residential and mixed-use structures, industrial facilities, road improvements, creek and trail restoration, and water and wastewater facilities.

Mr. Dare has extensive experience dealing with complex geotechnical challengessuch as landslide (including slope stability) evaluation and remediation, identification of and construction on liquefiable and expansive soils, soft soil remediation, and settlement mitigation. He spent many years managing the geotechnical and materials testing construction services groups. He is an experienced geotechnical peer reviewer for Bay Area Cities and Towns including Oakland, Orinda, Moraga, Piedmont, Belmont, and Martinez, and Counties such as Alameda and Monterey.

Kyle Mui

Staff Geologist

As a graduate engineer in geotechnical engineering, Kyle is contributing to solutions that support our evolving geotechnical needs. His background in geology stems from a deep appreciation for the Earth’s natural beauty. With a strong interest in Earth sciences and a passion for understanding how the planet’s history influences the built environment, Kyle is eager to contribute to meaningful, forward-looking projects that address the needs of a growing and changing world.

When he’s not exploring the world of geology, Kyle enjoys video games, collecting trading cards, and spending time with his cats.

Nicolas B. Haddad, PE

Senior Engineer, Geo-Engineering Solutions

Nicolas has over 34 years of experience in providing a unique combination of Environmental and Geotechnical engineering consulting services to development projects.

His extensive consulting experience includes addressing complex environmental issues, providing team leadership, fostering strong client relationships, and offering strategic guidance in risk management and project evaluation. He has supported a wide range of development projects, spanning land planning, educational facilities, commercial buildings, and residential subdivisions, while also contributing to professional development initiatives and long-term project success.

Nicolas has hands-on experience in managing large sites impacted with hazardous materials, from the immediate response assessments and investigations to the implementation of remediation design and operation, and case closure.

He has also managed geotechnical investigations, construction testing and inspection for a variety of projects including schools, commercial and residential developments.

Sarah Schmuck

Staff Geologist, Geo-Engineering Solutions, Inc

Sarah Schmuck is a Staff Geologist with two years of working experience in the geotechnical engineering field. Her project work focuses on borehole logging, fault trenching, and construction observation. She also has hands-on experience with project development, analyzing the mechanical properties of soils in Geo-Engineering’s soils laboratory.

Sarah Schmuck is a Staff Geologist with two years of working experience in the geotechnical engineering field. Her project work focuses on borehole logging, fault trenching, and construction observation. She also has hands-on experience with project development, analyzing the mechanical properties of soils in Geo-Engineering’s soils laboratory.

Outside of work, Sarah enjoys traveling, gardening and spending time outdoors with her dogs.

Eric J. Swenson, GE, CEG

President / CEO, Geo-Engineering Solutions, Inc

As President and founder of Geo-Engineering Solutions, I am committed to advancing the practice of geotechnical engineering by integrating a deep understanding of geology with the engineering behavior of soil and rock. I am passionate about fostering a culture of creativity and technical excellence among our engineers, geologists, and technicians, encouraging innovative approaches to complex challenges in the built environment.

With extensive experience across a wide range of complex and technically demanding projects, my portfolio includes work on deep-seated landslides, major earthen dams, high-rise developments supported by deep foundation systems, large-scale residential grading projects, soft soil remediation, liquefaction-prone sites, and active fault investigations. I bring a hands-on, practical perspective to each project, blending field expertise with rigorous engineering analysis.

Beyond my professional work, I enjoy exploring other passions, including cooking, traveling, hiking, fly fishing, and spending time with my family.