Who we are
Abner Duarte
Geotechnical Engineer, Director
CPEng, MEqEng, BE (Hons) Civil
I founded Cornerstone Geotechnical in 2023 with a vision to deliver technically sound, timely, and trustworthy geotechnical solutions. Whether you're navigating complex ground conditions or recovering from natural disasters, Cornerstone is your dependable partner — combining engineering rigour with a personal commitment to excellence.
I am a Chartered Geotechnical Engineer and our consultancy is built on the principles of technical excellence, integrity, and dependable service.
With a BE(Hons) in Civil Engineering from the University of Canterbury and a Master of Earthquake Engineering from the University of Auckland, I bring a solid academic foundation backed by years of hands-on experience across New Zealand’s diverse geological landscape.
Since launching my career, I’ve had the privilege of contributing to some of our country’s most significant infrastructure projects — from Auckland’s City Rail Link (CRL) to the Manawatū Highway and the Papakura to Drury SH1 project. As design lead on key packages, I developed a strong reputation for delivering reliable solutions in high-pressure environments.
My work has since expanded into the commercial sector, designing geotechnical solutions for large-scale warehouses on challenging ground, as well as into slope stabilisation and geotechnical remediation following extreme weather events in our recent history. I’ve played an active role in recovery efforts, including Auckland Council’s land categorisation assessments.
Our Team
"Behind every strong foundation is a team — because no structure, and no person, stands tall alone."
Cornerstone Geotechnical may have started as a one-person vision, but its strength comes from the unwavering support of the team behind the scenes — my family. My wife, with her administration role in the business and constant belief in the purpose behind this work, and my baby daughter, who reminds me daily of the future we’re building — they are the quiet force that fuels every decision, every late night, and every step forward. This business wouldn’t be what it is without them, and in many ways, they too are a cornerstone.