Robert Arias has been in the engineering business since 1977 and has spent much of his career providing geotechnical engineering and materials testing services in Central and South Texas. He has also provided geotechnical services in other states, Europe and the Middle East. Robert formed Arias in January 1996 in his very own garage, and has since grown Arias into a premier engineering firm. Robert has a Bachelor of Science in Civil Engineering and a Master of Science in Civil Engineering at The University of Texas at Austin.

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Jeremy has been employed at Arias since its founding in 1996 and currently serves as President of Arias, overseeing corporate operations. Through his leadership, our company excels in service to our customers. Mr. Arias has been in the IT field since 1996 and endeavors to assure that Arias resources including facility infrastructure, telecommunications, and general information technology operations assist Arias in achieving its corporate mission. Under his guidance, Arias has developed a project management and billing system (CORE) to improve service to our customers.

Jeremy studied Computer Science at Baylor University from 1999-2002.

Amber has been employed by Arias since its founding in 1996 in various administrative and operational roles. In January of 2007, she assumed management of the Human Resources department. Amber embraced the challenge of organization, personnel communication, training and recruiting and succeeded in developing an effective and vital Human Resources department. Mrs. Hawkins continues to adapt and improve Human Resources to best serve our employees and customers.

As the Vice President of Human Resources, she is directly responsible for the overall administration, coordination, and evaluation of the Human Resources function. Company-wide, she develops and implements personnel policies and procedures; maintains knowledge of industry trends, employment, and Federal and State legislation to maintain Arias’ compliance; conducts compensation reviews and oversees performance reviews; assists in contract review; conducts recruitment effort; monitors career pathing; and acts as a role model within and outside the company.

Amber received her Associates of Arts from Seattle Community College in 2005 and studied Spanish at Seattle University in 2006.

Angela currently serves as Chief Financial Officer (CFO) and oversees Arias' accounting and financial matters. With 20 years of experience in accounting, 11 of which were in construction/site work she brings knowledge as to how business and accounting is handled from that of our client’s perspective.

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Angela received her Bachelor of Business Administration in Accounting from the University of Texas at San Antonio (UTSA) in 2006 and an MBA from University of Phoenix in 2009.

Dexter Bacon began his engineering career in 1978. His project experience has been particularly in the Central and South areas throughout Texas. He has served as the Geotechnical Engineer of Record for numerous transportation, municipal, oil and gas, mining, commercial buildings, government, and private projects. Dexter has extensive experience with various deep foundation types including driven concrete and steel piling, drilled shafts, auger cast piles, and DeWaal type foundations. He also has extensive forensic experience on building and pavement distress projects and is an expert regarding expansive and soft soil issues.

Dexter is currently the Geotechnical Engineer for the Corpus Christi Harbor Bridge project and has performed several geotechnical projects along the Port of Brownsville and other Ports along the Texas Gulf Coast.  In Corpus Christi, he has served as the Geotechnical Engineer for projects including the USS Lexington Museum, the Corpus Christi Seawall Upgrades, and various ship docks and tank farm projects. In San Antonio, he has performed geotechnical engineering studies for the expansion of IH-10 from Loop 410 to Downtown San Antonio.

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‍Texas Registered Professional Engineer #54560

CoSA Special Inspector - Engineer SIE-24-00925
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TxDOT Precertification #12977
‍14.1.1 – Soil Exploration
14.3.1 – Transportation Foundation Studies
14.4.1 – Building Foundation Studies

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Scott joined Arias CMT department in 2024 as a Graduate Engineer. He progressed to Project Manager, where he quickly excelled in obtaining essential industry certifications, expanding his industry knowledge, and honing his project management skills.

Scott earned his Master of Science in Geological/Geophysical Engineering from Missouri University of Science and Technology in 2012 and has held various leadership positions in the US Army. With his educational background and 20 years of military experience, Scott has proven his ability to tactfully navigate construction projects, build partnerships, and inspire others.

In his role, Scott oversees department operations, mentors staff, and further enhances our commitment to delivering high-quality materials testing services.

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Karl Crenwelge, P.E. joined Arias in 2025 and serves as the San Antonio Geotechnical Engineering Department Manager. With more than 25 years of experience in geotechnical engineering, construction materials testing, and forensic investigations, Karl brings deep technical expertise and leadership to the firm. His background spans both public and private sector projects, with a strong emphasis on structural and geotechnical engineering.

He has held key leadership roles overseeing large teams and managing multi-million-dollar testing and engineering operations. Karl's influence, superb communication skills, and project management experience will give our clients the service they deserve.

Texas Registered Professional Engineer #84613

TxDOT Precertification #17820
‍12.1.1 – Asphaltic Concrete Production
12.1.2 – Portland Cement Concrete
14.2.1 – Geotechnical Testing
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John Landwermeyer has provided Construction Materials Engineering and Geotechnical Engineering services for projects in Texas since 1988 and has resided in Cedar Park since 1997. He has extensive experience analyzing foundations, pavements, and construction materials; working on a wide variety of commercial, institutional, municipal, and transportation projects. In 2013, Mr. Landwermeyer launched the Austin operations of Arias, offering full-service Geotechnical Engineering and Construction Materials Testing services.

Texas Registered Professional Engineer #79751
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TxDOT Precertification #5274
‍12.1.1 - Asphaltic Concrete
12.1.2 - Portland Cement Concrete
12.1.3 - Materials Engineering
12.1.5 - Portland Cement Concrete Placement
12.2.1 - Plant Inspection & Testing
12.4.1 - Pavement Design Services
12.5.1 - Pavement Evaluation
14.1.1 - Soil Exploration
14.2.1 - Geotechnical Testing
14.3.1 - Transportation Foundation Studies
14.4.1 - Building Foundation Studies

Alex Salcedo has served as Arias’ Director of Laboratory services for fifteen (15) years and is responsible for the technical quality of the laboratory testing performed by Arias. His numerous certifications reflect his extensive knowledge and experience in the testing of various materials. He has been in the geotechnical and CMT industries since 1993.

His laboratory experience includes testing of the following materials: asphaltic concrete, concrete, soils, masonry and aggregates. His field experience includes: monitoring of foundation installation, reinforcing steel observation, concrete placement observation and testing, post-tension observation, and in-place density testing of soil, aggregate, and asphalt.

TxDOT Precertification #28484
12.1.1 - Asphaltic Concrete Production
12.1.2 - Portland Cement Concrete
12.1.4 - Asphaltic Concrete Placement
12.1.5 - Portland Cement Concrete Placement
12.1.6 - Embankment / Subgrade / Backfill / Base Production
12.1.7 - Embankment / Subgrade / Backfill / Base Placement
14.2.1 - Geotechnical Testing