Senior Engineering Personnel

David Duff

Technical Director - Geotechnics

BE (Hons), MEngSc, FIEAust, CPEng, NER, RPEQ

David has over 25 years of experience working in geotechnical consultancies in Australia. He has extensive experience in investigation, design and construction of major infrastructure and transport projects as well…

Thomas Dale

Lead Geotechnical Engineer

BEng (Civil) Hons MIEAust

Thomas Dale is a practising Geotechnical Engineer and leads our geotechnical consulting team. He has over 11 years of experience in the civil consulting sector with a focus on construction…

Tony Matacin

Principal Geotechnical Engineer

BEng (Civil), BEng (Mining), MEngSc, MIEAust, CPEng, RPEQ, NER

Tony has more than 20 years’ engineering experience in road, rail, mine and water infrastructure projects. His experience includes design management, independent verification, ground investigations, instrumentation and monitoring, risk assessments,…

Mathew Swinbourn

Geotechnical Projects Coordinator


Matthew is a practising engineering geologist working as part of the Alliance Geotechnical (AG) consultancy team. Matthew has four years’ experience working as an Engineering Geologist in the Sydney Basin…

Sahar Mamouri

Senior Geotechnical Engineer

BE Civil, MEngSc, CPEng, NER

Sahar Mamouri is a Senior Geotechnical Engineer and has 15 years of experience in the fields of geotechnical and civil engineering. Sahar has been a part of many large-scale infrastructure…

Denny Jacob

Senior Geotechnical Engineer

BEng (Civil) ME (Geotech) MIEAust CPEng NER

Denny has over 6 years of experience working in the United States of America, Middle East and Australia on a wide range of geotechnical and civil engineering projects. These include…

Shiv Gangele

Senior Engineering Geologist

B. Sc, M.Tech Applied Engineering Geology

Shiv has over 15 years of experience in the geotechnical field both in Australia and Overseas with a vast experience in geotechnical investigations and construction phase services on many RMS,…

Lubos Melicharek

Senior Geotechnical Engineer

BE (Mining), MIEAust, CPEng, NER

Lubos has over 20 years of experience within the geotechnical field throughout Sydney and NSW. in Australia.  He has vast and wide acquired knowledge of field investigations, drilling, coring, sampling,…

Hadi Ajorlou

Senior Geotechnical Engineer

BEng (Civil) MEngSc (Geotech) MIEAust CPEng (Civil, Subdivisional Geotechnics, Structural) NER RPEQ

Hadi has over 10 years of experience working in Australia and the Middle East on a wide range of geotechnical and structural engineering projects. These include Tunnels and underground structures,…

Arash Afzali

Senior Geotechnical Engineer

BEng (Civil), MSc (Geotech), MIEAust

Arash is an essential team member responsible for the preparation of geotechnical investigation reports, project management, pile inspection, supervision of field investigation and preparation of tender technical documents. Arash started…