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Management
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Guido Roelfstra – Dr. Ing. Civil EPFL – Director individual SIA member Mob: +41 79 816 56 58 / E-mail : guido.roelfstra@drgr.ch |
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Nathalie Roelfstra – Commercial emloyee – Secretary E-mail : nathalie.roelfstra@drgr.ch
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Management
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Guido Roelfstra – Dr. Ing. Civil EPFL – Director individual SIA member Mob: +41 79 816 56 58 / E-mail : guido.roelfstra@drgr.ch |
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Nathalie Roelfstra – Commercial emloyee – Secretary E-mail : nathalie.roelfstra@drgr.ch
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