• Earthwork Monitoring

  • Site Investigations / Drilling

  • Laboratory Testing

  • Structural Investigations

  • NDT Testing

Key Projects

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GMTS, PSC (Geotechnical and Materials Testing Services) is a geotechnical engineering firm and soils / construction materials testing laboratory with offices in San Juan, Puerto Rico. Founded in 1996, GMTS provides comprehensive geotechnical engineering and soils / materials testing services to the construction and manufacturing industries, government, law firms, consulting groups and other clients in Puerto Rico and the Virgin Islands. The senior engineers in the firm have over 30 years of experience in a wide variety of geotechnical and material testing related projects. GMTS also performs Quality Control and Inspections in construction projects.

Mission / Commitment: GMTS’s mission is to provide cost effective, high quality, safe, and on-schedule professional services. To meet this commitment, the company has assembled a small but highly qualified staff of specialists, and is able to provide the individualized approach required by each client's project. Our service is our competitive advantage!

Meet Our Staff View Company Brochure


GMTS recently raised over $3,500 pro-benefit Hospital del Niño. GMTS and Hospital del Niño would like to thank all of those kind enough to donate to this cause. We hope (with your help of course) we can make this ‘Evento del Tinte’ an annual tradition. All we need is another volunteer… SEE YOU NEXT YEAR!

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GMTS is an AASHTO and USACE accredited soils and construction materials testing laboratory (R18, C1077 for aggregate and concrete, D3740 for soil, Hot Mix Asphalt and SFRM).

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