Excellence In Soil Engineering
Proven geotechnical expertise built over three decades of investigations, design, and consulting across New Zealand and internationally.
Reliable service spanning the Bay of Plenty, Waikato, Manawatū, Hawke’s Bay, and Wellington regions.
Clear, consistent pricing across all foundation investigations — making it easier to plan, budget, and move forward with confidence.
Dedicated, data-driven analysis and consulting delivering accurate insights tailored to your site and project requirements.
SOIL-ENG LTD is a multifaceted geotechnical engineering company with over 30 years’ experience in site investigation, in-situ testing, sampling, ground modelling, and preparing soils reports for resource and building consents. We’ve worked with a wide range of clients around the world, consistently delivering excellent service and completing projects on time and on budget.
Clients We’re Affiliated With

















Soil Eng provides comprehensive and efficient services across the full breadth of geotechnical engineering, including investigation, analysis, design, and reporting.
With over 30 years of proven experience in geotechnical, hydrological, and structural engineering, Soil Eng delivers clarity and confidence at every stage of land development.
Our multidisciplinary team has led investigations and designs across New Zealand and internationally, helping clients achieve efficient, cost-effective results built on solid data.
Soil Eng is committed to providing accurate and reliable geotechnical services to ensure the suitability and longevity of civil and structural works.
We always try to go the extra mile, having seen first-hand the significant construction cost reductions that comprehensive investigations can facilitate at the design stage.
With 30+ years of professional geotechnical engineering and design experience in New Zealand and internationally, Soil Eng can help ensure your private, commercial or industrial projects are a success.
We look forward to speaking with you.
Alwyn Strauss, Pr.Eng (NAM)
Owner / Director
A geotechnical investigation assesses the physical and engineering properties of the soil, rock, and groundwater beneath a site. This helps determine how suitable the ground is for construction and guides safe, cost-effective foundation design.
Timeframes vary depending on the project size and testing scope. Most standard site investigations and laboratory tests are completed within one to three weeks.
Soil Eng proudly serves the Bay of Plenty, Tauranga, Hamilton, Waikato, and Wellington regions.
We provide a wide range of reports, including site investigation reports, engineering soil reports, liquefaction and slope stability assessments, due diligence reports, and ground model developments for building and resource consent applications.
With a catalogue of successful projects around the country, our team has a comprehensive understanding of New Zealand geology and its geotechnical consequences.
With 30+ years professional geotechnical engineering and design experience in New Zealand and internationally, we will help ensure your private, commercial or industrial projects are a success.
Soil Eng are dedicated to client service and delivering projects on time and within budget. Efficiency, honesty and integrity underpin every investigation, report and recommendation.
With a catalogue of successful projects around the country, our team has a comprehensive understanding of New Zealand geology and its geotechnical consequences.
With 30+ years professional geotechnical engineering and design experience in New Zealand and internationally, we will help ensure your private, commercial or industrial projects are a success.
Soil Eng are dedicated to client service and delivering projects on time and within budget. Efficiency, honesty and integrity underpin every investigation, report and recommendation.
We value our client relationships and work diligently to achieve the best outcomes for projects and properties.
Our feedback speaks for itself:
Posted on Phillip Aaron HumeTrustindex verifies that the original source of the review is Google. Alwyn has Been fantastic to deal with throughout the geotech process. He was quick to respond and completed the report in a timely manner. I highly recommend Soil-EngPosted on Vicki JamiesonTrustindex verifies that the original source of the review is Google. Alwyn was very quick from the time we rung for a geotech report to the delivery of the report. We highly recommend Soil Eng. Thank you Alwyn 😊Posted on Margaret GrayTrustindex verifies that the original source of the review is Google. Alwyn was extremely professional. Very helpful and thorough. Very prompt and I would highly recommend him.Posted on Maxwell SedaratTrustindex verifies that the original source of the review is Google. Alwyn did an excellent job. He has great communication and was very helpful during the process. I would definitely use Alwyn again for any future projects.Posted on John SandersonTrustindex verifies that the original source of the review is Google. Alywn was great to work with. He carried out a pre purchase liquifaction assessment and report on a very short timeframe to meet our deadline. Soil Eng was also the most cost effective option available. Excellent work thankyou.Posted on Renei KeltTrustindex verifies that the original source of the review is Google. Alwyn was great to work with, very efficient and he provided an excellent service to get our project underway. Highly recommend him for any geotech work or soil analysis!Posted on Taree SmithTrustindex verifies that the original source of the review is Google. Excellent and professional service - would highly recommend Alwyn and would definitely use him again if the need arises.Posted on Jess BeardTrustindex verifies that the original source of the review is Google. Alwyn was fantastic to deal with and completed a thorough assessment and report. Would highly recommendPosted on Julie MarshallTrustindex verifies that the original source of the review is Google. Alwyn Strauss is a conscientious and dedicated professional. He doesn't cut corners. He goes out of his way to get a result which provides the information his customer requires. We recommend him in every way.