MJ Underground is a turnkey fiber optic and utility construction company delivering infrastructure solutions across Arizona and throughout the United States. With over a decade of experience and projects completed in nearly every municipality across the Phoenix metro valley, we have built a reputation for reliability, quality, and efficient project execution.
Our senior team brings more than 60 years of combined industry experience across all phases of fiber optic and utility construction. From engineering and permitting to aerial and underground construction, splicing, ISP installation, testing, and network turn-up, we provide complete end-to-end project support.
While Arizona is our home base, MJ Underground continues to expand nationally, including projects in the Virgin Islands, supporting telecommunications providers and infrastructure partners in building the networks that keep communities connected.

MJ Underground, LLC

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