Meet Our Management Team

Paul Stubbs

A Principal of JK Group since 1989, Paul’s experience as a geotechnical engineer and engineering geologist spans over 30 years and seven countries. By far the longest period has been working in the Sydney region with JK Geotechnics. Paul’s background includes a strong practical emphasis and knowledge of the drilling industry.

Linton Speechley

A Principal of JK Group since 2008, Linton’s primary areas of expertise include earth retaining structures and slope stability. Linton also acts as an independent peer reviewer and provides expert opinion on major projects both externally and internally.

Adrian Kingswell

A Principal of JK Group since 2012, Adrian is the principal environmental scientist with EIS and has over 20 years’ experience of consulting on contaminated land issues. He also has a very strong background in chemical and biological analysis gained from extensive experience in a number of international laboratories.

David Treweek

A Principal of JK Group since 2000, David leads the Soil Test Services and SoilCheck teams. David has extensive experience in bulk earthworks, road pavements, asphalt control and laboratory testing of engineering material on domestic and overseas projects.