ARCILIA ACOSTA
Arcilia Acosta is the Founder and CEO of Southwestern Testing Laboratories dba STL Engineers, a distinguished 100% Hispanic/Woman-Owned Business Enterprise (M/WBE) and Texas Historically Underutilized Business (HUB) based in Dallas, Texas. As a full-service Geotechnical Investigation, Construction Materials Testing, and Quality Management & Inspections firm, STL Engineers brings over 20 years of experience from both public and private sectors to deliver professional services throughout the state of Texas. Under Arcilia's leadership, STL has grown its client base and service area significantly, expanding its operations to include an oil and gas division in West Texas and the Panhandle based in Midland, Texas. Her extensive experience in the construction industry, combined with her commitment to diversity and excellence has positioned STL Engineers as a trusted partner for clients seeking high-quality geotechnical engineering and construction materials testing solutions. Arcilia’s entrepreneurial spirit and dedication to community service have earned her numerous accolades and recognition in both business and civic arenas.
STL Engineers proudly boasts a 10,000 sq. ft. laboratory facility that is fully equipped, AASHTO resourced and CCRL accredited, R-18 compliant, and USACE verified for geotechnical investigation, quality inspections and construction materials testing. The facility includes a 1,400 sq. ft. climate-controlled curing room for proper curing of concrete specimens across various time frames and meets the stringent requirements of ASTM D-3740, C1066, and ASTM E-329. This advanced facility, coupled with our trained technicians holding certifications like ICC, ACI, NICET, and TxDOT, underscores STL Engineers’ dedication to delivering efficient, accurate, and reliable results on a consistent basis for all of our clients.
FOUNDER & CEO, STL ENGINEERS


INSPECTION SERVICES
STL Engineers provides full service Quality Control & Quality Assurance inspections services. We provide inspections in the form of Transportation, Airfield, Roadway, Bridge, Vertical Building, and Civil and Facilities Construction. STL Engineers employees’ have a vast knowledge of all areas of inspection in the Construction and Testing field, with a vast knowledge in ASTM, AASHTO, and ACI standards.
