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 cement shortage

Cement Shortage Alters Site Stabilization Approach – April 2023

Due to the huge increase in central Ohio construction and limited cement availability nationwide, the cement products used for site stabilization are projected to be in short supply throughout 2023. Developers that typically rely on cement stabilization to obtain stable subgrades and retain stability throughout construction during wet seasons, will need to consider other options.

seeing underground

How to “See” What’s Underground – January 2023

Ground penetrating radar (GPR) and electromagnetic induction profiling (EM) are complementary technologies that can detect and map underground objects and conditions without excavation. Here’s a quick review of these non-invasive tools that GCI uses to conduct geophysical surveys for environmental and construction materials assessments.

concrete testing

The season of giving lasts all year round at GCI!

GCI created the GCI/Anne Longo Memorial Fund at the Columbus Foundation in memory of co-founder Anne Longo. Since its inception in June 2014, GCI has given $325,900 to the fund and distributed 291 grants totaling $243,607. “We’re passionate about supporting the charities our clients and employees are passionate about,” says Cindy Brass, GCI’s COO, manager of charitable giving, and daughter of GCI co-founders Anne and Dan Longo. “Charitable giving has been part of GCI from the beginning.”

Newsletter Archives...