From Zurich airport:

• S-Bahn railway No. 16
  Platform 1 to Zurich-Stadelhofen
  Direct connection - no need to change trains - departs every 30 minutes and takes 15 minutes 

From Zurich-Stadelhofen railway station:

• The office is located 10 minutes on foot (approx. 800 m) from Zurich-Stadelhofen railway station (head towards Tiefenbrunnen railway station)