In 2008 ATMOS celebrated its 120th anniversary and entered in 2010 in a new era with an enlarged management team and an organizational structure. At the top are now the two sons, the managing directors Frank and Maik Greiser, who now own 2/3 of the shares of the ATMOS group. MOS MANAGEMENT SERVICES LIMITED - Free company information from Companies House including registered office address, filing history, accounts, annual return, officers, charges, business activity Skip to main content Management - WIKING Helikopter Service ... Maintenance Organisation Training Purchasing/Logistic. ... Helikopter Service GmbH. Regular preventive maintenance is the basis for safe operation of your rolling stock, but wear and tear over time eventually requires a major locomotive overhaul, or "revision". Management System Safety First, Zero Accidents. The safety of our employees is always central to our planning and work and the ongoing training of our employees – with a specific focus on occupational safety – moves us towards our stipulated aim of ZERO ACCIDENTS .