Geofields SAS is a Colombian company that offers geophysical exploration methods for mining, oil, engineering, civil works, geothermal energy, groundwater, hydrogeological studies and environmental studies. We specialize in methods such as: Simultaneous Joint Inversion (SJI), Magnetotelluric, Induced Polarization, Electrical Tomography, Vertical Seismic Profile (VSP), Gravimetry, Magnetometry, Airborne Geophysics, Electrical Enhanced Oil Recovery, among others We have performed the two largest Magnetotelluric projects in Latin America, we are the only company in Latin America, capable of discriminating carbonaceous shales (graphite) from sulfides. We carried out the first successful pilot in Simultaneous Joint Inversion (SJI), with magnetotelluric and seismic data and for this reason we were awarded a project of more than 100 km. processing data to PSDM with (SJI). Data acquisition is fast, with simple logistics, which allows investigating large areas with reduced costs. Our methods are non-invasive, with light and portable measuring equipment, which allows investigating areas of difficult access without affecting the environment.