A proximity discovery system enabling a person to quickly and efficiently discover colleagues within their proximity without visual contact. The system comprises a mobile computing device including an antenna and transceiver for exchanging messages with a plurality of other mobile devices nearby the user device, a user detection module for detecting the messages from the other mobile devices, a proximity detector for estimating a distance between the user device and each of the mobile devices, a connection module for sharing biographic and professional information with the plurality of mobile devices based on one of a plurality of connection levels.