Siemens PSE Ltd.
I worked for four years on a large software development project with 200 developers. My task was to maintain a ClearCase-based build environment and to give support and training to the developers. The system consisted of shell and Perl scripts and ran on Solaris. Gradually I became a ClearCase administrator.
The team was divided into five sites in four countries, so daily communication with people in other countries and cultures was necessary and successful.
I created an install shell script for the veddvelem.hu coupon site. It was able to create a new machine in the Amazon cloud, installed the necessary software, grabbed the Ruby sources onto the virtual machine and loaded the database from backup, resulting in a fully working system -- in ten minutes.