LOR Geotechnical Group Inc.

Innovative. Communicative. Results Driven.

Our Vision

LOR's vision is to be a well-respected provider of geotechnical engineering and geo-environmental consulting services to selected clients in the industrial, municipal, and private business sectors. The firm's mission is to provide our clients with quality services that meet or exceed their expectations and satisfy their project needs.

LOR Geotechnical Group, Inc is an ESOP company; employees have a vested interest in the firm profits. This also helps to ensure that each employee is striving to maintain the firm's vision and mission and provide the highest quality and level of work to facilitate the firm's growth and reputation.


Get in touch

LOR Geologic Services knows that finding the right firm to bring your vision to live is a choice not to be taken lightly. That’s why we offer free consultations to walk you through your needs, the scope of your goals, and your budget.

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Our Beliefs


Open Lines of Communication

We believe the first step in satisfying a client's needs is to establish open and effective communication channels. This leads to building and maintaining strong relationships with clients. It also helps us to understand, anticipate, and satisfy the client's needs.


LOR is actively involved in technical, professional, and civic organizations. This enables our personnel to make contributions to the profession and community, as well as learn a variety of problem-solving skills. In turn, this allows us to bring insights and innovative solutions to our clients to help them solve the challenges that each project can have.

Individual and Professional Rewards and Advancement

A professional service firm's most important asset is its employees and LOR is no exception. Individual and professional rewards and advancement are shared responsibilities. Each employee has a personal responsibility for satisfying the firm's clients, continuing to develop personal and professional skills, and contributing to the success of our clients and the firm. The company is responsible for recognizing an individual's accomplishments and providing appropriate rewards and future opportunities.


Operating with integrity is fundamental to LOR's practice philosophy. We are committed to conduction all aspects of our practice with integrity. This includes internal operations with employees, as well as external operations with our clients and vendors. To our employees, clients and vendors we strive to bestow honesty, reliability and respect.

Client Value and Firm Profits

Client-received value is the true measure of worth of our services. We strive to provide services that our clients value like mutual work scope development, personalized attention, cost-effective solutions, and extensive client involvement in decision-making processes. In turn, we expect to generate a consistently acceptable and sustainable level of profit that are necessary for the firm's long-term stability, employee compensation and development, and focused growth.


Key Management and Personnel

John P. Leuer, President, CE, GE

John Leuer has gained a high-level of expertise with over 30 years of experience on literally hundreds of geotechnical projects. In this time, Mr. Leuer has developed an extensive knowledge of the many geotechnical considerations involved in construction in the southern California area. Mr. Leuer is highly experienced in all aspects of soil and foundation engineering for a wide variety of projects ranging from multi-story commercial and industrial structures to several thousand acre planned community developments. Mr. Leuer has substantial experience coordinating projects for many City, County and State agencies as well as in the public sector, gaining a reputation for being responsive to clients needs while providing strong technical expertise.

Mr. Leuer holds a B.S. in Civil Engineering from Cal State University at Northridge. He is a registered Geotechnical and Civil Engineer in the State of California, and a registered Civil Engineer in the State of Nevada. Mr. Leuer is a member of the American Society of Civil Engineers and the National Groundwater Association. Mr. Leuer believes in continuing education and completed a nine-month soils engineering course at the California State Polytechnical University in Pomona. In addition, Mr. Leuer has instructed evening Soils Technology courses at Riverside Community College for Inspection Certifications.

Robert M. Markoff, PG, CEG

Robert Markoff has over 25 years of experience as an Engineering Geologist. Mr. Markoff has experience in all aspects of geotechnical, engineering geologic investigations, and in management of residential, commercial, and industrial, as well as Public Works projects. Geotechnical investigation work has included geophysical surveys (seismic refraction and radar methods), slope investigation, liquefaction analysis, groundwater evaluation, as well as fault investigations.

He has proposed on, planned, supervised, and conducted geotechnical projects including hillside investigations, flatland explorations, and earthwork monitoring projects in Riverside, San Bernardino, Orange, Los Angeles, Ventura, and San Diego Counties.

Mr. Markoff is a registered Geologist and Certified Engineering Geologist in the State of California. He holds a B.S. degree in Geology from the University of California at Riverside.

Andrew A. Tardie

 As a staff geologist for over 19 years with LOR Geotechnical Group, Inc., Mr. Tardie has been involved in all phases of geotechnical projects, ranging from initial site investigations to inspection and testing of soils/materials within the field and laboratory during construction. Mr. Tardie has performed and managed numerous geotechnical, geologic, and environmental investigations throughout the Inland Empire. This work has included geophysical survey, slope investigations, liquefaction analysis, and seismic hazard analysis, which includes fault surface rupture. Specialized detail in Mr. Tardie’s experience has included logging exploratory borings and trenches, obtaining and documenting field samples, percolation/infiltration feasibility testing, pavement evaluation, and subsequent geotechnical report writing. Mr. Tardie holds a B.A. degree in Geology from California State University, San Bernardino.

Mr. Tardie is a member of the Geological Society of America (GSA), the Association of Environmental and Engineering Geologists (AEG), South Coast Geological Society (SCGS), and the Inland Geological Society (IGS).

Mathew L. Hunt

Mathew Hunt has over 12 years experience in the environmental field. Mr. Hunt works under LOR Geotechnical Group’s environmental operations and has conducted over 200 Phase I Environmental Site Assessments for the private and public sectors.  The properties have ranged from agricultural to residential to commercial/industrial.  In addition to his experience with environmental assessments for property transfers, he has worked on projects that require mitigation prior to development.  Mr. Hunt is well versed in hazardous waste sampling and characterization methodologies in soil and groundwater regimes for groundwater monitoring, site assessment, and site remediation.  Projects have ranged from leaking UST’s at gasoline stations to commercial and government (including CERCLA sites) projects involving metals, perchlorate, and solvents.

Mr. Hunt has a B.S. in soil science from California Polytechnic State University, San Luis Obispo and a M.S. in soil and water science from the University of California, Riverside.