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  • Stronghold Engineering, Inc.



    About Us

    Stronghold Engineering, Inc. (SEI) is an award-winning design and construction firm specializing in renowned projects for some of the nation’s largest organizations. Throughout our nearly 30-year hist

    Rep/Contact Info

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    Alyssa Digangi
    Director of Business Development and Special Proje
    Kay McCain
    Human Resource Manager
    • Phone: (951) 684-9303 X216