Stefan has 20 years experience as an environmental scientist, hydrogeologist and groundwater resource/contamination modeller. Stefan has extensive experience in undertaking, project managing and providing technical input for: contaminated land and groundwater characterisation projects; risk assessment and groundwater fate and transport modelling projects; land remediation projects; groundwater impact assessments for major infrastructure and mining projects and numerical modelling groundwater resource investigations. This has included the conceptualisation and implementation of a number of groundwater monitoring programs.