About JK Group

Linton Speechley

Principal Geotechnical Engineer

Specialising in slope stability, shoring and retention system analysis, landslide risk assessments.  Linton has wide-ranging experience on a variety of technically challenging projects in NSW and interstate and was part of the JKG peer review team for the Port Botany expansion.

Andrew Jackaman

Principal Geotechnical Engineer

Specialising in dam and levee investigations and assessments, deep basement excavations, earthworks, landslide and river bank stabilisation. Andrew’s experience extends throughout NSW and interstate. He has distinguished himself as the geotechnical lead in multi-disciplinary design teams focusing on smart, practical and cost effective solutions.

Peter Wright

Principal Geotechnical Engineer managing our Central Coast office.

Peter specialises in pavement design, analysis of shoring and retention systems, with a particular interest in landslide risk assessment for residential projects and council roads.  Peter’s extensive experience consistently enables him to develop cost effective solutions for sites and projects with complex geotechnical issues.

Daniel Bliss

Principal Geotechnical Engineer

Responsible for successful project management of the geotechnical investigation as part of the “Western Sydney Airport Enabling Activities”.  Daniel’s experience as the JK Group Systems Manager was invaluable in meeting the administrative requirements of the project.

Rolf Rohleder

Principal Geotechnical Engineer

Rolf has over 25 years’ experience in the consulting engineering industry, both in Australia and abroad. He is a Chartered Engineering Geologist / Geotechnical Engineer and has developed expertise in most areas of geotechnical engineering, including project management of multi-discipline projects from feasibility design to construction.  He has an interest in site investigations, ground modelling, slope stability, and ground improvement.

Vittal Boggaram

Principal Associate Environmental Scientist/Engineer and Manager of JKE.

Water and climate resilience specialist.

Brendan Page

Principal Associate Environmental Scientist and Manager of JKE.

CEnvP Site Contamination Specialist.

Paul Roberts

Principal Associate Engineering Geologist, SE Qld Office Manager

Specialising in landslide risk assessments, slope stability analyses, coastal and river bank erosion assessments, as well as providing geotechnical advice for residential, industrial and commercial developments and expert witness services. Paul manages JK Geotechnics operations in Queensland. Paul can be contacted for all your projects’ geotechnical and engineering geological requirements in Queensland.

Woodie Theunissen

Principal Associate Geotechnical Engineer

Woodie has worked on a wide variety of infrastructure, industrial, commercial and residential projects requiring a diverse range of technical capabilities.  Whilst Woodie completes a broad spectrum of work, space constraints on developable sites have required increasingly ambitious design solutions to meet the client’s expectations, whilst protecting neighbouring properties and infrastructure.  As a result, Woodie’s skill set has therefore needed to focus more on 2D and 3D analysis to achieve positive outcomes for developments.  Woodie has extensive experience working collaboratively in multi disciplinary teams to assist in developing designs that meet both the client and infrastructure owner’s requirements.

Mitchell Delaney

Senior Associate Environmental Scientist at JKE.

Specialist in contaminated land, landfills and aged/healthcare projects.

Todd Hore

Senior Associate Environmental Engineer at JKE.

Specialist in site contamination, waste and remediation.

Adrian Hulskamp

Senior Associate Geotechnical Engineer

Adrian has a wide range of experience throughout the Sydney area and beyond, meeting the needs of a broad range of public and private sector clients. Adrian has extensive experience assessing the geotechnical stability of sites for projects in the Snowy Mountains region of NSW, in accordance with the requirements of the Kosciuszko Alpine Resorts Geotechnical Policy.

Nicholas Smith

Senior Associate Geotechnical Engineer

Specialising in developments near road and rail corridors.  Nick has a comprehensive understanding of the geotechnical challenges associated with developing above and adjacent to rail and road corridors in the Sydney metropolitan area. He has also been involved in a number of technically challenging land-based and foreshore developments.

Katrina Taylor

Associate Environmental Scientist at JKE.

Hazardous materials and contaminated land specialist. Licensed Asbestos Assessor.

Ali Parsa

Associate Geotechnical Engineer

Ali has a PhD in Geotechnical Engineering and is our primary geotechnical analysis engineer specialising in 2D and 3D FE analysis of all manner of technically challenging developments with a complex range of geotechnical issues.

Matthew Pearce

Associate Geotechnical Engineer

Matt has been involved in the construction stages of a number of large projects including the UTS ITE Building. He was also JKG’s project manager for the viaduct section of the Metro North West Line. Matt provides geotechnical advice for all types of projects from design development through to construction.

Owen Fraser

Associate

Jarett Mones

Associate

Duncan McDermott

Drilling Manager

David Treweek

Laboratory Manager

Tom Finnegan

Earthworks Manager

Bruce Walker

Formerly a Principal Geotechnical Engineer and Director of JKG.

Bruce is a highly respected senior member of the Sydney geotechnical community. Bruce was the Convenor of the Working Group which prepared the AGS Landslide Risk Management Guidelines first published in March 2000. Bruce now acts as an independent geotechnical consultant primarily involved in peer review and expert reports.

Paul Stubbs

Principal Engineering Geologist and former Director of JKG.

Paul continues to be involved in more complex and/or sensitive projects, forensic analysis of damaged structures and slope failures, projects with a high component of engineering geology, and providing expert reports.

Agi Zenon

Formerly a Principal Geotechnical Engineer with JKG.

Agi now acts as a specialist geotechnical consultant primarily involved in select projects and expert reports associated with insurance claims and court related matters.