Security training instructor demonstrating baton handling and defensive techniques during a Level III security guard training class while a student practices a blocking stance indoors.
Global Security and Investigative Services LLC Launches First Level III Armed Security Guard Training Class in San Benito

Global Security and Investigative Services LLC Launches First Level III Armed Security Guard Training Class in San Benito May 13, 2026 San Benito, TEXAS — Global Security and Investigative Services LLC (GSIS) successfully launched its first Level III Armed Security…

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GSIS CFO Alva Salinas stands outside the Harlingen Public Library holding donated items from the library’s community wishlist near the library entrance sign.
Global Security and Investigative Services LLC Supports Literacy Through Donation to Harlingen Public Library

Global Security and Investigative Services LLC Supports Literacy Through Donation to Harlingen Public Library May 7, 2026 HARLINGEN, TEXAS — Global Security and Investigative Services LLC (GSIS) proudly donated educational and community focused items to the Harlingen Public Library through…

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Alva Salinas and Samantha Duque pose at the 2026 Protos Security Conference in front of a presentation screen thanking attendees for their partnership.
Global Security and Investigative Services LLC Attends Protos Security Conference in Las Vegas

Global Security and Investigative Services LLC Attends Protos Security Conference in Las Vegas April 13, 2026 LAS VEGAS, NEVADA — From April 8 through April 10, representatives from Global Security and Investigative Services LLC (GSIS) attended the Protos Security Conference…

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