Engineering a Stable Future

As part of MacKay, we bring expanded resources, technical expertise, and regional reach to better support our clients and communities. Nelson Geotechnical Associates will continue operating under its existing brand during a phased transition process, with a formal transition to the MacKay brand planned for September.

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Our Services

Now part of MacKay, Nelson Geotechnical Associates (NGA) specializes in geotechnical engineering, subsurface investigations, and foundation design. By applying the principles of soil and rock mechanics, we evaluate site conditions, assess risks, develop practical and innovative solutions, and provide construction monitoring to support successful project outcomes.

Backed by MacKay, we offer expanded capabilities to support complex projects at every stage.

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Development

Support for clients looking to develop, renovate or decommission property

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Environmental

Assessments to minimize or avoid adverse environmental effects or full hazardous site remediation assistance

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Coastal & Marine

Infrastructure designed to maintain and protect our coastal habitats

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Expert Witness Services

Litigation services in the field of Geotechnical Engineering

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Infrastructure

Designing the systems that keep us connected

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Landslides & slope stability

Assessing the static and dynamic stability of natural and man-made slopes as well as the engineering of mitigation measures

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Testimonials

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“I cannot emphasize enough their professionalism, attentiveness, and rapid response to their clients. Whenever geotechnical engineering is needed on a project, NGA is always my first call.”

Fred Owyen
Lakewood School District

“NGA always looks out for the client’s needs, providing cost-effective solutions and services.”

Erik Davido, PE
Davido Consulting Group, Inc.

“Nelson Geotechnical continues to be an integral part of the team developing a seamless methodology over the years producing projects that are predictively effective and satisfying. Such a pleasant and responsive staff with valuable practical reasoning and a strong problem solving ethic, they are always a pleasure to work with.”

Andrew Kovach AIA
Kovach Architects

“Nelson has become a go-to recommendation to our clients for their geotechnical needs, often-times developing into a repeat and long-term relationship based on their experience and service provided.”

Tim Gabelein, PE
Davido Consulting Group, Inc.

“Our firm has worked with NGA on dozens of foundation and slope repair projects over the past two decades. We’ve found them to be responsive, professional and knowledgeable about the issues concerning soil composition, infiltration testing and other geotechnical engineering needs. We often recommend NGA to our clients as a trusted resource for Geotechnical engineering. They are also just really great people to work with!”