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Thanks for contacting Modular Security Systems Inc. (MSSI) and the people responsible for the MAC Portals patented turnstile access control system. We've received your submission and someone from our team will be reaching out with more information as soon as possible.

While some businesses are built on thinking outside the box, MSSI’s business is built on reinventing the box; that is, taking what others see as a single-use container and reconfiguring it and giving it multiple, pragmatic purposes for contractors the world over. Learn more below.

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Modular Security Systems Incorporated (MSSI) is leading the way to a more secure world, one turnstile at a time.
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Secure Your Jobsite with Modular Guardhouses from MSSI At Modular Security Systems Inc. (MSSI), we pride ourselves on designing and manufacturing unique perimeter security...

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Employee Spotlight Series: Episode Four Are you ready for another episode of our Employee Spotlight Series? On episode four, we want to introduce you to Jessie Kindermann....

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MSSI Introduces Access Control 101 Page on SecuredByMAC.com Modular Security Systems, Inc. (MSSI) is excited to introduce its all-new Access Control Page! At MSSI, our...

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