Confidence built from the ground up.
With decades of combined experience, AJD & Associates, Inc. delivers accurate, timely, and professional inspections so contractors and property owners across Northern California can build with confidence.
Our core values
Experienced & certified
Trusted partners
Local knowledge
Grounded solutions
Our services
Whether you are building a home, managing a commercial project, or overseeing infrastructure, our team delivers the geotechnical expertise and inspections you need to move forward with confidence.
Geotechnical and soils testing
Investigating subsurface conditions through sampling and analysis to determine soil strength, stability, and suitability for safe and reliable construction.
Special inspections
Verifying structural components such as reinforced concrete, steel connections, and anchor installations for safety and compliance.
Geological services
Providing site evaluations including slope stability, groundwater availability, and preliminary geologic assessments.
About
Founded in 2025 by Anthony J. DeMartini, AJD & Associates, Inc. was built on a passion for delivering the best geotechnical and special inspection services across Northern California.
With a trusted team of engineers, inspectors, and a dedicated geologist, we bring decades of combined experience in soils testing, geotechnical consulting, and structural inspections.
We are known for our responsiveness, reliable turnaround times, and clear communication, helping contractors, architects, and property owners move forward with confidence.
Strong foundations lead to successful projects. That is what we are here to deliver.
The people behind AJD
Anthony J. DeMartini, GE
Principal Engineer, Owner
Andrew Leavitt
Project Engineer
Donald Whyte, CEG
Geologist
Gracie Lock
Administrative Staff
Henry Sazuma
Lab Technician
Contact us
Have a project in mind? Let's talk.