Southeast Engineering and Environmental combine engineering, environmental management and ecological expertise to provide solutions for developers, government and industry.


Lachlan Bain – Business Owner, Principal Engineer

Lachlan has a Bachelors Degree in Environmental Engineering, and a Masters of Environmental Management from the University of NSW.

Lachlan has over 12 years of experience in the water management field,  from policy and strategic advice for local government authorities to conceptual and detailed design of water management systems.


Brogan Addison – Senior Engineer

Brogan has a Bachelors Degree in Environmental Engineering

Brogan is an Environmental Engineer with over 10 years of experience in water related design and construction projects.  Brogan’s waterway rehabilitation and Water Sensitive Urban Design skills are complimented by a background in hydraulics and hydrology projects including flood studies, stormwater harvesting and development planning/design of stormwater infrastructure.


Mark Harris –  Ecologist

Mark is a regular collaborator with Southeast.  Mark has a Degree in Environmental Science and over 10 years experience in ecological assessment & planning, ecological restoration. Mark is a member of the Ecological Society of Australia & the NSW Ecological Consultants Association.