Geisenberger finished second behind team-mate Anke Wischnewski during the opening World Cup round in Igls that saw Felix Loch win the men's event and Tobias Wendl and Tobias Arlt the doubles.
Germany had a clean sweep in the men's event in Austria and another duo on the podium in the doubles while Wendl and Arlt won again as the World Cup on home soil in Koenigsee got underway.
Toni Eggert and Sascha Benecken were second for the second successive race before Geisenberger continued Germany's incredible start to the season by producing a storming first run and then holding onto it.
Geisenberger clocked 50.712 seconds for the lead from run one and, despite going slower in 50.738 second time out, it was enough to edge out team-mate Tatjana Hufner by just 0.031.
Hufner was third after run one with 50.772 but produced 50.709, by far the best, from run two to move up the field but it was just narrowly short of her first win of the season.
Alex Gough, third during the opening round, had to make do with the same place again, 0.120 behind Hufner while Wischnewski was fourth and another German Aileen Frisch was fifth.