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Silica of the Isthmus, started operations in 1974, going through different stages of modernization with a clear vision for growth. From October 1995 it became part of FEMSA-Packaging in glass containers division. Since the change of administration extra efforts were made to build a well balanced company with leading technology, quality assurance system guaranteed and especially highly trained and motivated through the promotion of quality of life. SISA assures strategic success with a clear focus on customer satisfaction, and that staff understand and "live" business mission, which says: "distinguished service to the foundry, silicate glass and silica sand for its operations by offering competitive advantages and providing a service engineer to promote a long term relationsh…