At the World Ski Orienteering Championships in Bulgaria in 2002 , Lauenstein started for Switzerland and finished sixth in the relay. In the individual competitions he was 15th and 19th. In summer 2002 he was used for the first time internationally in orienteering. He started at the European Championships in Hungary and in the World Cup. The following year he started at the home world championship in Rapperswil and was fourth in the relay. His breakthrough came in 2005 when he finished second on the long distance behind Russian Andrei Khramov . In the season with Matthias Merz and Daniel Hubmann he won bronze. At the 2006 World Cup he was also second on the long distance, this time behind Jani Lakanen from Finland. As a long distance specialist, he started at the following world championships on the long distance, but did not come out on an eighth place. At the European Championships he reached a fifth place on the long distance in Primorsko in 2010 , which he repeated at the European Championships two years later. At his last world championships in Lausanne in the same year, he was ninth in the middle distance.
He won the Swiss championship in 2002 with the CO Chenau and 2011 with the ANCO Neuchâtel in the relay. In 2002 he was Swiss champion in night running and in 2005 he was a team champion with Chenau. With the club Vehkalahden Veikot he started several times at Jukola and took third place four times.
In 2006 Lauenstein won the Napf Marathon , a mountain marathon with over 1500 meters of altitude in a time of 2:58:28 h.
