Down Under Construction


Down Under Construction (DUC), a Hylan Company, stands as a prominent leader in the market for trenchless and trench-based construction and installation across various technologies. Established in 1993, DUC excels in serving diverse sectors, including federal government, land developers, utilities, and large electrical contractors, from its headquarters in Sterling, VA. We are pioneers in the Mid-Atlantic region’s directional drilling and underground construction industry, and as trenchless installations became more popular beyond the telecommunications sector, DUC’s growth has mirrored the rising demand for our extensive services.


Down Under Construction prides itself in providing detailed, precise construction solutions, keeping in mind the unique requirements of different infrastructures. Our range of services, backed by OSHA compliant personnel and equipment, is diverse and well-tailored to specific needs, whether it’s in perimeter security barricades or power duct bank systems.

We provide a list of our key services below, but we are more than happy to discuss your specific project needs to provide a custom solution.

Government Services

We have fulfilled numerous contracts for all levels of government, including secure communications and autonomous operations.


We provide a wide array of construction services, including Duct Banks, Site Work, Rural and Dense Urban Underground Civil, and many more.


Our services encompass OTDR and Reel Testing, Coax and Waveguide, Facility Cable Networks, and others.

Design Engineering

We offer design services for twisted pair, coaxial, fiber optic, and copper cable networks.


Our management, procurement, warehousing, and outsourced labor services support clients across the United States.

DAS Construction

We have vast experience in offering full end-to-end indoor and outdoor DAS solutions.


Hylan is happy to discuss new projects and partnerships.