During his tenure, the extension of a loan guarantee, granted in 2009 by the German federal state Saarland, was achieved and the track superstructure division was sold to Vossloh-Werdohl GmbH, a subsidiary of Vossloh AG. SaarGummi said that it will continue to supply compounds and raw materials to the track superstructure division. Weyer started his professional career at the SKF Group in Schweinfurt, Germany. From 1993 - 1998 he was employed with the automotive supplier Draftex in Viersen, Germany. Later he worked for Dynamit Nobel, where he served from 2001 as a member of the board of the controlling company Dynamit Nobel AG. In his last position at the US investor KKR, he restructured the former Siemens ceramics business into an independently operating business unit, which was sold to Johnson Matthey as Argillon GmbH in 2008. The SaarGummi Group is a supplier of sealing systems. The group of companies with headquarters in Luxembourg operates production sites in Germany, Czech Republic, Slovakia, Spain, India, Brazil, and the USA. In 2009, SaarGummi employed about 3,300 people and reached sales of more than EUR 300 million.