 Jahrling's Australian representative debut was in 1993 in a coxed four which rowed to a fifth placing at the 1993 World Rowing Championships in Racice.The following year at the 1994 World Rowing Championships in Indianapolis he again placed fifth, this time in the coxless four.In 1995 Jahrling was selected to the Australian eight and he raced in that boat, stroked by Rob Scott, at the 1995 World Rowing Championships in Tampere, Finland to overall eleventh place.