Thank you for taking the time to visit our STL website. Our company is a dedicated engineering firm built around our commitment to deliver the best value for our clients. We appreciate your business.

Arcilia C. Acosta
President & CEO
STL Engineers
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STL Engineers is dedicated to providing the highest level of professionalism and integrity to our customers.

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 providing professional services in the transit, transportation, municipal, government, education, commercial, and aviation industries.

Our AASHTO Accredited and U.S. Army Corps of Engineers  (USACE) validated lab meets the requirements of ASTM D3740 and ASTM E 329, ASTM C 1077, maintains USACE validation for and is an active participant in the Cement and Concrete Reference Laboratory (CCRL) proficiency sample system. 

STL Engineers has the following certifications:

    DBE -North Central Texas Regional Certification Agency (NCTRCA)
    HUB -Texas State Historically Underutilized Business
    MBE - D/FW Minority Business Development Council
    AASHTO Accreditation -American Assoc. of State Hwy. and Transportation Officials
    TxDOT Precertification - Texas Department of Transportation 
    USACE Validation - U.S. Army Corps of Engineers