Design Novel Geophysical Sensor System needed

We are looking for an experienced Geophysical Instrumentation Engineer to design and develop a prototype hardware device for gold exploration and underground mineral detection. Requirements: Experience in geophysical instruments, mineral exploration, or metal detection hardware... (Budget: $250 - $750 AUD, Jobs: Circuit Design, Electrical Engineering, Electronics, Embedded Systems, Firmware Development, PCB Layout, Research and Development, Signal Processing)