Eisenlauer made his World Cup debut in December 2010. As of April 2014, his best finish is a 6th, in a classical team sprint event at Nove Mesto in 2013–14. His best individual finish is 7th, in a Tour de Ski freestyle sprint race at Oberhof in 2013-14. His best World Cup overall finish is 58th, in 2013-14. His best World Cup finish in a discipline is 22nd, in the 2013-14 sprint.