MasCom Technologies, based out of 4 Sophie-Germain-Straße, Bremen, Bremen, Germany, was founded in 1991 and has started with offering service and repair for high resolution mass spectrometer from Thermo Fisher (former Finnigan MAT). Today MasCom Technologies refurbishes and sells mass spectrometer and provides worldwide service and repair for ion trap MS, quadrupole MS, and high resolution GC-MS systems from Thermo Fisher. Almost exclusively MasCom offers service for the MAT95XL/XP instruments for more than 20 years. In addition repair of roughing and turbo molecular pumps is available. MasCom also stocks spare parts and consumables for these instruments which are available through MasCom’s on-line shop at www.mascom-bremen.de. In 2000 the on-line shop for MS spare parts and consumables was opened and expanded until today with over 8000 different parts sold to more than 3500 customers worldwide. For more than 15 years MasCom also manufactures secondary electron multipliers (SEM) and has become one of the world leading manufacturer for multipliers. Most recently, in cooperation with Thermo Fisher, the DFS high resolution MS was added to the list of instruments serviced by MasCom.