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ST. CHARLES, MO. — TSI Global Cos. LLC has moved into its new 40,000-square-foot headquarters in St. Charles, a northwest suburb of St. Louis. The technology company provides custom-built audio-visual systems, infrastructure cabling, electric and security systems. The project team included Al Droste & Sons Construction, Gray Design Group and developer 370 Tech Center LLC. TSI performed the cabling, technology and electrical systems engineering and installment. TSI also plans to open an office in Charlotte, N.C. in effort to facilitate major clients outside of the Midwest area.