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The HR advisor of the faculty of Science that supports all employees within the Observatory is Marian van de Walle, you can reach her via m.w.van.de.walle@science.leidenuniv.nl, her office is in the Gorlaeus Bestuursgebouw at the faculty of science, room 0.17 see also https://www.universiteitleiden.nl/medewerkers/marian-van-de-walle#tab-1.