If you want to get to the Berlin Office by public transport, you can use the following lines: U8, S3, S5, S7, S75 to S + U, Jannowitzbrücke station.
If you take the subway, follow the exit for Schicklerstr and you will emerge in front of Schicklerhaus.
If you use the S-Bahn lines, then use the exit for Alexander Street. If you're under the bridge next to Alexanderplatz and next to the intersection for Stralauer St. – turn left and cross the road, Schicklerhaus will be in front of you.
All other information on public transport can be found via the following link: www.bvg.de