From 2000 to 2007, Keiner was senior research assistant at the Institute for Spatial and Landscape Development at ETH Zurich and senior lecturer for Geography at the University of Innsbruck, where he obtained his habilitation in 2005.
Marco Polo | Marco Stroppa | The Travels of Marco Polo | Marco Pierre White | Marco Antonio Muñiz | Marco Materazzi | Marco Delonge | Marco Borsato | Marco Rubio | Marco Polo Bridge Incident | Marco Island, Florida | Marco Island | Marco Ferreri | Piazza San Marco | Marco Barrientos | MARCO | San Marco Argentano | Marco Venturini | Marco Travaglio | Marco Simoncelli | Marco Pantani | Marco Pallis | Marco Huck | Marco Fu | Marco Follini | Marco Dorigo | Marco Doria | Marco Cyncar | Marco Blaauw | Marco Aurelio Soto |