Contact Us

What we've

over 940+ clients trusted TWE on 3,140 projects in 2023

History of taking on
the most challenging
earth materials and engineering     system projects

A better way to cutting-edge

Established in 1993, Tolunay-Wong Engineers, Inc. (TWE) is one of the largest geosciences consulting firms in the Gulf Coast Region. Our offices are located across Texas and Louisiana.  We are driven by our 380+ employees who have a shared sense of creativity and humility and a desire to have a positive impact on the world.

Geotechnical Engineering

With a history of saving our clients millions of dollars, our highly regarded engineering staff evaluate subsurface conditions to develop foundation and site development recommendations for planned construction through engineering, subsurface exploration, and laboratory testing. Our core areas of expertise include but are not limited to:

  • LNG plants, petrochemical, landfills, pipelines, levees

  • Commercial & land development, universities, and hospitals

  • Transportation highways, roads, bridges, tunnels



Construction Materials Testing

Our CMT Division produces thousands of individual reports annually for various laboratory tests and field inspection of construction materials. Most of these involve concrete, aggregates, soils in-place, and bituminous materials. Also, we regularly test brick, granite, stone masonry, mortar, and manufactured elements, such as prestressed beams and precast panels.

Geophysical Services

We possess a wide array of engineering applications to conduct near-surface geophysical explorations, such as locating underground voids, utilities, tanks, piping, potential hazards, geologic features, and anomalies, to enhance your construction projects.

Environmental Field Services

Whether it is consulting or field services for “soft” natural resource management and regulatory analysis projects or “hard” hazardous materials management projects, we have the staff and equipment resources to execute projects that support our clients’ environmental compliance initiatives.

Deep Foundations Testing

Specialized in using Pile Driving Analyzer, Case Pile Wave Analysis, & wave equation analysis (GRLWEAP) to evaluate static axialpile capacity and integrity, and provide complete driven pile deep foundation testing programs for projects of any scope and foundation type.  We also provide drivability & constructability studies, and inspector charts to evaluate the most efficient hammer systems and ensure proper driven pile installations.  

Marine Geotechnical

Mobilizing lift boats and geotechnical drilling fleet , our engineers evaluate foundation design, construction, maintenance and decommissioning for human-made structures in the sea and for other offshore site investigations

We operate an extensive fleet of CPT and drilling equipment capable of scaling to clients' project needs and maintaining our safety standards.

State of the art equipment allows us to deliver agile support.


Award-Winning Safety Record

Certified Lab Testing

Geotechnical Drilling Fleet

Texas Department of Transportation [TxDoT]

American Association for Lab Testing

US Army Corps of Engineers

AASHTO Materials Reference Lab Standards



DIAMOND Level Award,ABC Safety Management

"BEST IN CLASS"37th Houston Safety Excellence Awards

"ExxonMobil Contractor Safety Program and ZERO Injuries"




Delivering Confidence