What We Do

Soil and ground water, rock and aggregates, concrete and asphalt, we deal with it all.

GEI Consultants (formerly Central Earth Engineering) provides geotechnical engineering and construction materials and testing services in Central Ontario and surrounding areas. GEI Consultants (formerly Central Earth Engineering) also provides specialty slope stability and retaining structure advice throughout Ontario. We offer these comprehensive services to various sectors (private and public) and for all types of developments (residential/commercial/industrial, municipal servicing and roads, etc.). No job is too small or too large.

Click one of the services below to learn more about what we do.


Geotechnical Engineering

Geotechnical investigations with boreholes and test pits to determine the subsurface conditions at the start of any project, and provide soil, rock and ground water engineering advice appropriate for the proposed works.

Construction Inspection

On-site inspections are integral for the quality and performance of built structures. These inspections include compaction for backfill, aggregates and asphalt, foundation subgrade & reinforcing steel reviews, concrete quality, etc.

Laboratory Testing

Testing of construction materials such as soils, aggregates, concrete and asphalt. These tests ensure that the right materials are being used for the right purposes on site.

Who We Are

Our Mission

GEI Consultants mission (formerly Central Earth Engineering) is three-fold:

  1. Provide a fair price for high quality engineering services.
  2. Maintain quick, open and honest communication.
  3. Commit to providing timely services, and meeting deadlines.
Company History

Central Earth Engineering was founded in 2017 to provide geotechnical and construction materials testing and inspection services in Central Ontario (Barrie and surrounding counties). In December 2020, the team of Central Earth Engineering joined GEI Consultants to provide the high quality level of services to clients throughout Ontario.


Alexander Winkelmann, P.Eng.

Geotechnical & Earth Sciences Manager

Mr. Winkelmann is a licensed professional engineer, with over 10 years of experience in geotechnical engineering in Southern and Central Ontario. After graduating from Queen’s University with a bachelor’s degree in geological engineering, Mr. Winkelmann immediately joined the private consulting field and has not looked back since.

What differentiates Mr. Winkelmann is that he oversees both the geotechnical and materials testing aspects of a project, not just one or another. That means there is always one point of contact, for both the routine day to day parts of a project, and also when more in depth aspects need to be looked at. He knows that to provide good service to his clients, that responding quickly and honestly, and providing good value (the right cost for the right quality), is the cornerstone of being the best engineer possible.

Where We Serve

To provide geotechnical engineering, local knowledge is key to providing high quality services. Having a sense of the geology and local subsubsurface conditions before even digging a hole in the ground can save time and money for everyone involved.

GEI Consultants (formerly Central Earth Engineering) serves all of Ontario, but focuses on providing services in Central Ontario, including the areas of:

  • Simcoe County (including Barrie, Orillia, Bradford, Innisfil, Midland, Collingwood, Angus and Wasaga Beach)
  • Grey County (The Blue Mountains and Owen Sound)
  • Dufferin County (Orangeville, Shelbourne and Grand Valley)
  • District of Muskoka (Gravenhurst, Bracebridge, Huntsville and Port Severn)
  • Northern portion of Kawartha Lakes