Founded in 2002, TriStar Global Energy Solutions (GES) is the parent company of leading specialty contractors in the energy i ... ndustry; TriStar PetroServ, Global Vapor Control, and Zyme-Flow Decon Technology. These affiliates supply innovative and proven solutions to customers worldwide in the areas of non-entry tank cleaning and waste processing, VOC control and degassing, and process unit decontamination for vessel entry. Currently, TriStar GES employs around 200 people with offices in Houston, Texas City, and Los Angeles. read more