Olympus Czech Group, s.r.o. (Ltd.) is a leading European company in the field of medical and consumer electronics. For its Czech branch, we have implemented open source helpdesk system OTRS with MySQL on both Windows and Linux platforms (virtualized servers under VMWare), including import 10-year history of the original ticketing system (MS SQL Server) and adjustments open Perl code system to better adapt the system user requirements and optimization of their work. Development takes place using Mercurial platform for code versioning and teamwork.