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 within approximately 100 meters of 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. At a first level, the users exchange name and initial corporate affiliation data, while at a second level they exchange more detailed professional data and social media contact data.