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STL Engineers

Name: STL Engineers
Address: 535 Regal Row, Dallas, TX, 75247, US
Telephone: (214) 630-3800

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STL Engineers

STL Engineers is a full service Geotechnical Engineering and Construction Materials Testing firm founded in 2003 by Ms. Arcilia Acosta.

Our Dallas based company is a Hispanic/Woman owned firm with staff experience in both the public and private sectors. Our Dallas based company is a Hispanic/Woman owned firm with staff experience in both the public and private sectors providing professional services in the rail transit, transportation, municipal, government, education, commercial, and aviation industries. GEOTECHNICAL ENGINEERING

STL Engineers offers a complete range of geotechnical services for onshore and near-shore projects. Our technology-driven capabilities include preliminary site characterization and feasibility studies: integrated geophysical and geotechnical site surveys; drilling sampling and ins-site testing; laboratory testing of soil, rock and construction materials; detailed geotechnical analysis and foundation design, as well as, research and consultant services. Our geotechnical engineers design the subsurface investigation specific to the type of structure and geologic setting. Through the use of state-of-the-art techniques and standard test procedures, our geological engineers develop comprehensive recommendations and solutions. Specific areas of geotechnical expertise include:

• Foundation design engineering
• Pile load tests expansive soils
• Dewatering systems
• Embankments
• Slope and erosion protection
• Dam inspections
• Retention structures
• Pavement design
• Failure investigation and forensic studies
. . . . . . . . . . . . . . CONSTRUCTION MATERIALS TESTING

STL Engineers’ construction materials department offers a complete range of construction materials testing/inspection services for all phases of your project. Our capabilities include:

• Observation and testing of soil type, compaction and stabilization
• Aggregate evaluation
• Concrete mix designs
• Observation of drilled pier/pile foundation systems
• Observation and testing of concrete
• Observation of reinforcing steel/post tension
• Observation and testing of masonry
• Observation of structural steel fabrication and erecting
• Welder qualifications and procedures
• Observation and testing of bituminous paving
• Roofing inspection and testing

STL Engineers’ construction materials personnel can provide on time testing/inspection services as required for the project. With our state of the art LMS system, STL Engineers is able to provide reporting on a daily and/or weekly delivery schedule. We will create and implement such a delivery schedule as may be required to meet the needs of our client and their project.

03/06/2026

As we celebrate Women in Construction Week and Women’s History Month, we proudly honor the incredible women who make a lasting impact at CARCON Industries and STL Engineers.

From the jobsite to the boardroom, from engineering to project management, the women on our teams are leaders, innovators, and visionaries helping shape the future of construction. Their strength, vision, and dedication not only drive our success but also inspire the next generation to build with confidence and purpose.

This month and every month, we celebrate the women who are breaking barriers, mentoring others, and proving that excellence in construction knows no limits. Your commitment, creativity, and resilience continue to move our company and our industry forward.

Thank you for everything you bring to our mission and for reminding us what it truly means to build with heart, integrity, and purpose.

02/18/2026

Driving safer together is a commitment we take seriously at CARCON Industries and STL Engineers. Yesterday, our teams came together for a joint defensive driving training session led by David Martin, our Corporate Safety Director for both organizations.

David shared practical, real-world strategies to help our employees stay alert, anticipate hazards, and make safer decisions behind the wheel on and off the job. Defensive driving is more than compliance; it’s about protecting our coworkers, our families, and everyone sharing the road with us.

We’re proud of our teams for their engagement, thoughtful questions, and dedication to continuous improvement. By investing in defensive driving training, we’re reinforcing a culture where safety comes first on every trip, every time, and working together to ensure everyone goes home safely at the end of the day.

02/04/2026

The STL Engineers leadership team had yet another incredible experience at the World of Concrete 2026 Expo in Las Vegas, NV — one of the most influential gatherings for professionals shaping the future of construction and infrastructure.

Over the course of the event, our team connected with thought leaders, discovered the latest advancements in concrete technology, and explored innovative products, equipment, and techniques that continue to move the industry forward. From sustainability solutions to emerging design tools, the insights gained will help us continue to deliver even greater value and precision in the work we do every day.

We are proud to be part of this community that celebrates innovation, collaboration, and progress in the built environment — and we are proud to bring what we learned back to our projects across Texas and beyond.

11/11/2025

On Veterans Day, CARCON Industries and STL Engineers honor the courageous men and women who have served our nation with dedication and strength. Your bravery and sacrifice safeguard the freedoms that allow our communities and industries to thrive. Thank you for your service, and for reminding us of the true meaning of commitment, honor, and integrity.

09/30/2025

STL Engineers is excited to partner with Oncor on the Prong Moss Switch project in Midland. This initiative will upgrade West Texas’s critical energy infrastructure. As the project’s trusted geotechnical and testing partner, STL Engineers is providing thorough site investigations, advanced construction materials testing, and quality management services to help deliver a state-of-the-art 345-kV switching station and rebuilt transmission lines. This collaboration with Oncor will boost reliability, meet the region’s growing energy needs, and pave the way for a resilient future throughout the Permian Basin. STL Engineers is proud to play a hands-on role in one of the most important Tier 1 transmission upgrades for Texas.

06/19/2025

Today, CARCON Industries and STL Engineers proudly celebrate —a day that marks the end of slavery in the United States and honors the enduring spirit, strength, and achievements of African Americans throughout history.

We recognize that Juneteenth is not just a celebration of freedom, but also a call to reflect, learn, and continue striving for justice and equality in our communities and workplaces. As we commemorate this important day, we reaffirm our commitment to fostering an environment where every voice is valued, diversity is embraced, and opportunities are accessible to all.

Let’s honor the past, inspire change in the present, and work together for a brighter, more inclusive future. Happy Juneteenth from all of us at CARCON Industries and STL Engineers.

05/02/2025

STL Engineers is honored to have contributed to the DFW Terminal C High Gates modular project through our quality materials testing and inspections services. Our team played a key role in the overall quality of the structures and ensuring the safe fabrication and overnight transport of the six large-scale modules, each weighing up to 1,200 tons and extending over 200 feet. This innovative modular construction method represents a significant milestone for DFW Airport, enabling the addition of nine new gates by 2026 while minimizing operational disruptions. We are proud to support DFW’s continued growth and commitment to delivering an enhanced travel experience for all passengers. STL is helping move .

Building on this success, the Terminal C High Gates project set the standard for DFW’s current modular expansion-paving the way for six additional modules at Terminal C and another six mega modules for Terminal A, with each new phase raising the bar for efficiency and innovation in airport construction.

04/17/2025

STL Engineers is excited to continue building on our collaborating partnership with ONCOR on a series of significant transmission infrastructure upgrades in the works, including projects like:

- The Quartz Sand to Hog Mountain line
- The major 345 kV Reiter to Tesoro line.
- Midessa South Switch - Midessa 138Kv line: Cut in Sloan Switch for Greater Bryant G Solar.
- Benge Tap: Establish 138kV Point of Delivery for XTO Energy, Inc.
- Wellbore Switch - Barr Ranch Switch 138kV.

This week, we proudly marked a milestone after a 210 cubic yard pour completion for a T-line foundation at the Mid-Dessa South Switch. Our West Texas Market division is proudly working to provide essential quality control and inspection services to ensure the reliability and performance of these vital projects, contributing to the $1.12 billion Tier 1 initiative powering the state forward!

04/03/2025

STL Engineers would like to recognize one of our exemplary employees, Jesus Gonzalez who was selected for the employee spotlight this quarter! With 8 years at STL Engineers and over 10 years of experience as an inspector, Jesus is an integral part of the STL Engineers quality management team out at DFW Airport. If there’s an issue, DFW knows that Jesus will work tirelessly to resolve it in a professional manner with our team. Jesus has been a catalyst in creating a great partnership based in trust and understanding between STL Engineers and DFW’s Quality Team. His communication, work ethic and dedication to quality set him apart at DFWIA and showcase the ideals that STL Engineers strives for when working with clients, partners, subcontractors and other stakeholders.

Thank you for everything you do for the company and your peers, Jesus!

03/08/2025

On International Women's Day, CARCON Industries and STL Engineers recognize the crucial role women play in shaping the future of construction and our world. We celebrate the incredible women within our teams, as well as all women whose strength, innovation, and unwavering dedication contribute to building a better future. It is your diverse perspectives and contributions that strengthen our businesses, communities, and families. We are committed to fostering growth and opportunity for women in our industry and beyond. Thank you for your leadership, resilience, and for building a better tomorrow.

02/07/2025

The STL Engineers team had an incredible experience for our company's first time attending the World of Concrete 2025 in Las Vegas, Nevada. The entire convention center place was buzzing with over 57,000 other construction professionals checking out the latest and greatest from 1,500+ exhibitors at this year's convention. Our construction materials testing leadership team witnessed some groundbreaking innovations, from mind-blowing carbon fiber concrete repair demos to sustainable concrete solutions that are cutting CO2 emissions by 10%. The next-gen admixtures were also impressive, boosting performance while being environmentally friendly. It was immensely inspiring to see the industry so focused on sustainability, efficiency, and smart tech. Our team came back with a ton of great ideas and innovative solutions for STL Engineers to consider immediately integrating into our operations and service offerings, and we cannot wait to put them into action!

11/25/2024

🎁❄️ Spread Holiday Cheer with CARCON Industries & STL Engineers! ❄️🎁

CARCON Industries & STL Engineers are teaming up with Dallas LIFE for our first-ever coat and toy drive! Help us bring warmth and smiles to those in need this holiday season.

Why Dallas LIFE?
• Largest homeless recovery center in North Texas
• Transforming lives since 1954
• Innovative "Homeless No More" program

How You Can Help:
• Donate new or gently used coats
• Give new, unwrapped toys
• Every contribution makes a difference!

Let's show the power of community and make this holiday season brighter for everyone. Your kindness can change lives! 💖

For more information, visit https://dallaslife.org/donate-new-used-items/

Address

535 Regal Row
Dallas, TX
75247

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm

Telephone

(214) 630-3800

Website

http://www.stlengineers.com/

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