We have established a vibrant team environment in which technical expertise is valued, personal ethics, positive attitudes and enthusiasm are encouraged. We actively support further learning, scientific research and career development.


Neil Sutherland

Director/Principal Agricultural & Environmental Scientist & Hydrographer

Neil Sutherland provides considered environmental assessment and technical advice that draws upon his agricultural and environmental science training, site investigation skills and some 30 years of industry experience gained in Australia and overseas.

Regularly called upon to provide expert witness evidence to assist the courts, Neil is well versed in statutory and regulatory processes and helping clients achieve sensible, sustainable outcomes.

Neil established Gilbert & Sutherland Pty Ltd in 1997 and has served industry and the community through voluntary roles as former Chairman of both the Queensland Acid Sulfate Soils Committee and the Gold Coast City Council’s Waterfuture Committee, overseeing the creation, consultation and implementation of the Gold Coast Waterfuture Strategy.


Griffith University, Brisbane, Australia. Master of Science in Environmental Management.
National College of Agricultural Engineering – Cranfield Institute of Technology, Silsoe, England.
Post-graduate Diploma in Land and Water Management.
Seale-Hayne Agricultural College, Devon, England.
BTEC Higher Diploma in Agriculture.


Erin Holton

Director/Principal Environmental Scientist & Engineer

Since joining Gilbert & Sutherland in 2005, Erin Holton has gained substantial experience in site assessment, soil and water investigation, erosion and sediment control, acid sulfate soils, stormwater assessment and management and site environmental auditing.

Building on her Bachelor of Environmental Science degree and considerable environmental skills and knowledge, Erin completed a Masters of Environmental Engineering in 2009.


Bachelor of Environmental Science, Master of Environmental Engineering, Griffith University, Queensland.


Phil Matthew

Principal Agricultural Scientist

Phil Matthew joined Gilbert & Sutherland in 2007 after 20 years with the University of Queensland as a lecturer/researcher at its Gatton Agricultural College.

An expert in soil science and soil/water interactions, Phil specialises in good quality agricultural land, mining and extractive industries, groundwater, wastewater disposal and reuse, and the identification and management of environmental impacts.


University of Queensland, Gatton, Queensland. Doctor of Philosophy, Agricultural Science.
University of New England, Armidale New South Wales.
Master of Resource Science, Expert Systems, Graduate Diploma of Urban and Regional Planning.
University of Queensland, Gatton Queensland. Bachelor of Agricultural Science, Soils and Land Resources.
Member Australian Institute of Agricultural Scientists and Technologists.


Greg Holland

Principal Environmental Scientist

An expert in soils, site assessment and environmental management, Greg Holland was a foundation member of the G&S team in 1997.

Greg’s involvement in Acid Sulfate Soils research and policy development in Queensland included serving on the Technical Committee developing the Queensland Acid Sulfate Soil Technical Manual, Soil Management Guidelines (2002).

Leading land developers and major project managers lead the list of clients that seek out Greg for his sound technical knowledge and broad project experience.


Bachelor of Science in Australian Environmental Studies, Graduate Diploma in Sustainable Land Management, Griffith University, Queensland.