Electrical Substation Design

Exceptional Engineering. Innovative Construction Services. Dedicated to Safety. We engineer the foundations of thriving communities. David Mason + Associates has delivered exceptional engineering and innovative construction services since 1989. We bring technical excellence, creative problem‑solving, and proactive communication to deliver solutions that stand up to real‑world complexity. With offices across St. Louis, Chicago, Philadelphia, Tampa Bay, Indianapolis, and Cleveland, our licensed professionals bring the experience and craftsmanship that clients trust.As a certified MBE, DMA provides comprehensive engineering and construction‑related services—from civil and structural engineering to surveying, utilities, and field services—supporting healthcare, education, transportation, water, and public infrastructure projects. See our project work We work efficiently so your projects.

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3D scanningCCTV inspectioncivil engineeringconstruction administrationhydro excavationSewer cleaningsite developmentstormwater managementstructural engineeringsurveying