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Power Your Next Move With

We are proud that over nine-hundred EPC firms, Fortune 500 companies, municipalities, land developers,  universities, hospitals, consulting groups, and industry professionals, trusted TWE on their projects in the last 12 months [2022].

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 Development, universities, and hospitals

  • Transportation highways, roads, bridges



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.  

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 300+ employees who have a shared sense of creativity and humility and a desire to have a positive impact on the world.


TWE operates a full service geotechnical and environmental drilling operation.

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

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

“Best in Class” at the 35th Houston Safety Excellence Awards

Awarded the "ExxonMobil Contractor Safety Program and ZERO Injuries"
“Best in Class” at the 29th Annual Houston Business Roundtable

Compliant with ASTM E-329, ISO IEC Guide 17025 and NQA-1 quality



Award-Winning Safety Record

Certified Lab Testing

In-house Fleet

Texas Department of Transportation

American Association for Lab Testing

US Army Corps of Engineers

AASHTO Materials Reference Lab Standards



Local leadership

Personal approach


At TWE, we value our local partnerships and focus on delivering the best value for clients. In order to accomplish this, we carefully curate and establish a long-term local presence at each of our branches supported by local engineers with access to all of our resources company-wide.

Relentlessly innovative by nature, our accomplished professional staff includes former university professors, industry veterans, and project engineers who work with startups, small-mid sized clients, and Fortune 500 firms everyday. Leveraging decades of industry experience, our executive engineering team provides expert leadership to the TWE team and long term value for our clients.

Our Approach