Commercial and Residential Contractor J. W. Dubis & Sons is a fourth-generation family excavation business serving the Cape Cod area for over 75 years. Our scope of work includes: Residential, municipal and commercial excavation needs Land clearing and grading Excavation and backfill for foundations Installation of water lines Installation of Town sewer connections Installation of septic systems Septic pumping Driveways; grade, stone, shell, small paving jobs