Leupin was an engineer-topographer at the Swiss Federal Topography from 1904 to 1920 – from 1915 to 1920 as section head. From 1920 to 1926, he worked at the Helbling surveying office in Flums. In 1926 he became self-employed and managed the surveying office Leupin & Schwank in Bern until his death in 1950.

[1] This article bases on Mair, Toni. Grieder, Susanne. Das Landschaftsrelief – Symbiose von Wissenschaft und Kunsthandwerk. Mit Schweizer Reliefkatalog. Verlag hier+jetzt. Baden, Schweiz. 2006. S.162.

See also: H.M. E. Leupin, Topograph und Grundbuchgeometer, Bern. In: Schweizerische Zeitschrift für Vermessung, Kulturtechnik und Photogrammetrie. Vol. 49. 1951.