From the airport via public transport:
Take the S-Bahn S1 (direction Ostbahnhof) or S8 (direction Herrsching) to Hauptbahnhof. Change to U-Bahn U2 (direction Feldmoching) and get off at Theresienstrasse.
Ticket: The easiest option is to buy the Airport-City-Day-Ticket for 11.00€. You can travel within the full MVV area via S-Bahn, U-Bahn, Bus and Tram for the whole day. This is a special ticket and valid immediately after purchase (unlike the other tickets, which have to be stamped).
From airport via taxi/cab:
Cabs are available at the airport and cost approximately 55€ to the center of Munich.
We are located in Luisenstraße (see map). Within the building directions are signposted. We are located on the second floor (note: there is a mezzanine floor), our secretary Evelin Winands is located in room 2514.