Edwin Gaucher graduated from the École Polytechnique de Montréal in 1955 with an engineering degree, specializing in mines and geology, and completed his PhD in geology at Harvard University in 1960.

He was a geophysicist and vice-president at SOQUEM from 1966 to 1975. Prior to his time at SOQUEM, he worked for one year in an open-pit iron mine, taught for two years at Laurentian University in Sudbury and spent four years as a geophysicist with the Geological Survey of Canada.

In 1975, Gaucher founded Géosig – a geophysical and geological services company that he headed up until 1995, when the company’s former employees took ownership.

Concomitantly with the launch of Géosig, Gaucher founded Instrumentation GDD. Financed largely through research grants, the company has created various instruments for the prospecting industry. In 1995, his son, Pierre Gaucher, and Régis Desbiens took the helm at Instrumentation GDD.

Until his retirement in 2014, Edwin Gaucher ran Ex-In, a mine exploration micro-company that recently began a new compilation of drill holes extending over some 200,000 metres at the former Opemisca Mine.