We Are D&S Engineering Labs

Geotechnical Engineering

The Geotechnical Engineering Services are provided by Professional Engineers, Geologist and highly trained drill crews and lab technicians. Our staff has extensive experience allowing us to provide high quality engineering services enabling you to construct a useful, reliable and economical structure. Services provided involve geotechnical recommendations including bearing capacity, expansive soil movement, shallow and deep foundations, settlement studies, retaining wall analysis, slope stability, lateral earth pressures, earthwork and subgrade preparations, pavement design as well as advanced geotechnical testing.

Construction Materials Engineering Testing

Licensed professional engineers oversee D&S’ construction materials testing projects. Our technical staff has extensive experience working with our clients ensuring proper design criteria are referenced, quality materials are being used, and construction proceeds according to the project plans and specifications, in order to ultimately protect the owner and to keep the public safe. Licensed professional engineers oversee D&S’ construction materials testing projects and are available to trouble-shoot should issues arise during construction.

Geotechnical Drilling

D&S owns its own drilling rigs allowing us to perform field investigations without relying on sub-contractors. D&S’ fleet includes one CME-75, two mobile B-58s, one Moble B-47, an ATV-Mounted CME 550 and a rubber tracked skid mounted rig for unique cases. D&S can perform field investigations through drilling and sampling soils and rock strata using continuous flight augers, hollow-stem augers, and rock-coring equipment. Our ATV mounted rig allows D&S to negotiate soft ground conditions soon after inclement weather enabling additional schedule maintenance.


D&S was featured on INSIDE THE BLUEPRINT,
a fast-paced TV series that takes a sweeping look
at innovations in the commercial construction and design spaces, chronicling ideas and products that impact how we live, work and play.

D&S was featured in GeoDrilling International’s January/February 2017 edition. TxDOT contracted D&S drilling services to collect data for the restoration of two bridges damaged by flooding: State Highway (SH) 63 over the Sabine River and
FM 2626 over Quicksand Creek.  Read the Article…

“This was the first time I had seen a geotechnical report from D&S and I was very pleased.
The report for the new Prosper Town Hall was well organized, clear and concise,
easy to understand, and contained all of the information I needed for my structural design.”

– Barry K. Krieger, P.E. { JQ Engineering }

Our Team

Amy Brothers, PE

Amy Brothers, PE


Jason Brothers

Jason Brothers

Vice President

Jud Sherman, PE

Jud Sherman, PE

Principal, Construction Materials Engineering Testing

Mark G. Thomas, P.E., P.G.

Mark G. Thomas, P.E., P.G.

Principal, Geotechnical Engineering Testing

Brad King

Brad King

CMET Operations Manager

Jason Middleton

Jason Middleton

Geotechnical Operations Manager

Local Presence, Reliable Expertise, Dependable Service

Our Work


“Accredited laboratories demonstrate that their testing services not only conform to specific national and international standards, but are also of the highest quality. Accreditation can enhance a customer’s confidence in the testing provided by the laboratory. Accredited laboratories have been subjected to vigorous on-site, third party assessments. During these assessments, each test method is demonstrated in its entirety by the laboratory’s technical staff, and the testing apparatus associated with each test is evaluated. The assessment also includes a thorough review of the laboratory’s quality management system, including records of technician training and competency evaluations as well as equipment calibration and check records. Additionally, a detailed review of all accreditation requirements, including participation in the AMRL and CCRL proficiency sample programs, is conducted for each accredited laboratory at least once per year.”


Texas Board of Professional Engineers

D&S is registered with the Texas Board of Professional Engineers to provide Engineering Services in the State
of Texas.


D&S Field and Lab Technicians are certified by the American Concrete Institute to provide quality service within Concrete Construction Industry.


D&S Labs and Technicians are certified by the Texas and Oklahoma Departments of Transportation.

Oklahoma Board of Professional Engineers

D&S is registered with the Oklahoma Board of Professional Engineers to provide Engineering
Services in the State of Oklahoma.


D&S is now certified by the Texas Historically Underutilized Business (HUB) Program in order to support minority participation requirements.


D&S is now certified by the Texas Department of Transportation as part of their Small Business Enterprise (SBE) Program.


D&S Engineering Labs, LLC is certified as a Women’s Business Enterprise by the Women’s Business
Enterprise National Council (WBENC)



D&S services are completed in accordance with an AASTHO Accredited Quality Management program to assure equipment calibrations, maintenance and
tests comply with national standards. Our laboratories participate in the Cement and Concrete Reference Laboratory (CCRL) and AASHTO Material Reference Laboratory (AMRL) proficiency sample programs.


On May 1, 2015, D&S received accreditation by the
U.S. Army Corps of Engineers, to conduct materials testing.


Our safety track record and commitment to personnel training and safety awareness has placed D&S in compliance with BROWZ.  This allows D&S to work at companies that require BROWZ certification.

Contact Us

COLLINSVILLE (Corporate Office)

106 ½ Hughes Street
Collinsville, Texas 76233


1101 Shady Oaks Drive
Denton, Texas 76205


14805 Trinity Blvd
Fort Worth, Texas 76155


4702 S. Texoma Parkway
Denison, Texas 75020


2220 Veterans Blvd
Ardmore, Oklahoma 73401

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