Max Halkjaer has a +20 year career as a hydrogeophysicist. He obtained his Master degree in geophysics at Aarhus University, Denmark in 1995. He has contributed to a large number of projects across the world with a focus on protecting groundwater aquifers and groundwater sustainability. With an entrepreneurial mindset he has been involved in the development of GIS based tools used for analyzing water quality, processing geophysical data and interpreting the geometrical extent of aquifers. He is the co-founder of the company SkyTEM Surveys providing airborne geophysics developed specifically for groundwater mapping. He has comprehensive experience with assessing and modeling the interaction of fresh and saline water in arid as well as very humid geographical areas.