Sean E. O. Roosen is a businessperson who founded Osisko Mining Corp. and who has been the head of 12 different companies. Presently, Mr. Roosen is Executive Chairman of Osisko Gold Royalties Ltd., Chairman & Chief Executive Officer for Osisko Development Corp. (a subsidiary of Osisko Gold Royalties Ltd.) and Chairman & Chief Executive Officer at Osisko Green Acquisition Ltd.

He is also on the board of Brett Resources, Inc. and EurAsia Holding AG (former Chairman-Supervisory Board).

In his past career Sean E. O. Roosen held the position of Chairman for Falco Resources Ltd., Founding Chairman at Condor Energies, Inc., Founding Chairman at EurAsia Resource Holdings AG, Independent Director at Osisko Mining, Inc. and Chairman for Niogold Mining Corp. (a subsidiary of Osisko Mining, Inc.), Operations Director of IRT Interconti Trading GmbH, Chief Operating Officer of Falcon Energy, Inc., Non-Executive Chairman of Rio Novo Gold, Inc., Chairman of Barkerville Gold Mines Ltd., President, Chief Executive Officer & Director at Osisko Mining Corp. and Operations Manager at Etruscan Resources, Inc.

He received an undergraduate degree from Haileybury School of Mines.