gci 40th anniversary

Geotechnical Consultants Inc. (GCI) provides a complete range of practical, cost-effective geotechnical engineering, environmental and construction materials engineering and testing services to help clients manage risk and make timely informed decisions.

With GCI's sound engineering principles, in-depth knowledge of regulatory requirements, experienced personnel and innovative approach, clients trust that their projects will be completed on time with future risk mitigated.


geotechnical engineering

Geotechnical Engineering

GCI provides a broad range of geotechnical engineering expertise services, subsurface exploration and soil testing to assist clients in managing underground risk.

environmental engineering

Environmental Consulting

GCI provides a full range of environmental assessment, inspection and remediation services to assist clients throughout environmental due diligence, design, clean-up and construction.

engineering field services

Field Services

GCI's Construction Materials Engineering and Testing (CoMET) services provide continuity for clients from design throughout construction, keeping clients' construction projects on track with our knowledgeable and experienced problem-solving approach.

special inspections

Special Inspections

Special Inspections involve the evaluation of materials, workmanship, and the interpretation of contract documents. Chapter 17 of the Ohio Building Code details the required Special Inspections for 20 categories of construction work.

steel nde


GCI's structural steel testing and non-destructive examination (NDE) testing staff are trained and certified to provide a broad range of observation and testing services to keep clients' construction projects on track and compliant with applicable codes.

Building Envelope Consulting

BEC services during design and construction provide independent review, testing, and observation to confirm that building envelope elements are installed according to specifications, the building performs as designed, and costs are minimized.

Post-Tensioned Concrete

Post-tensioned (PT) concrete construction is a method of strengthening concrete or other materials with high-strength steel cables or strands, commonly referred to as tendons.

Roller Compacted Concrete

Roller Compacted Concrete (RCC) is a type of pavement used for heavy-use or industrial pavement when strength and durability are especially important.


Time Domain Reflectometry (TDR) or “cable radar” was adapted by GCI's Kevin O'Connor to monitor movement of foundations, roadways and slopes as well as changes in groundwater conditions and soil moisture.


gci advanced technology

Firestopping Reminders for Fire Prevention Month

Fire- and smoke-rated assemblies are required by Building Codes to create compartments which limit fire or smoke spread and provide time, paths and prescribed maximum path lengths for building occupants to escape safely. The purpose of firestopping is to restore the rating of fire- and smoke-rated wall and floor/ceiling assemblies destroyed due to joints and penetration by pipes, cables, ducts, busways, cable trays, and miscellaneous structural elements.

esa standards

Five Things Developers Need to Know About ASTM’s New Phase I ESA Standard

The proposed new ASTM Standard E1527-21 for conducting Phase I Environmental Site Assessments (ESAs) went public in late 2021 and is positioned mostly as “clarifications.” But there are several changes that could have a significant impact on real estate development projects. These are the top 5 changes GCI sees that clients should pay attention to.

concrete testing

How GCI is Addressing the Soaring Demand for Concrete Testing Services

Concrete is one of the most commonly used building materials in the world and the demand for concrete construction-related services is soaring. Not only is construction booming, but the type of construction includes more concrete than ever before. Read on for details about the steps GCI is taking to keep pace with the increased demand.

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