David Mason + Associates (Dma)

Over decades, they’ve shaped iconic projects—from airports and stadiums to sewers, tunnels, and utility networks.

They champion a blend of latest technology and old‑fashioned hard work to deliver efficient, low‑risk infrastructure solutions.

Their services span civil, structural, surveying, utility (including hydro‑excavation and CCTV sewer inspection), and aviation engineering.

They’re known for tackling major renovation and expansion work—such as the Busch Stadium, Gateway Arch grounds, Lambert airport runways, and Forest Park renewal.

Their story is one of steady growth, technical mastery, and a reputation for delivering time‑sensitive and budget‑driven infrastructure projects.

Team

oriented environment with supportive and helpful colleagues

Family

first mentality where leadership remains available and engaged

Fair pay with transparent trust in employees

Opportunities for growth and impact visible at all levels

DMA‑led energy modeling and efficient system design enabled a church renovation to achieve net‑zero operational energy usage

Implemented LED lighting, ground‑source heat pumps, energy‑recovery ventilators, and PV‑ready infrastructure in projects

Commissioning and energy audits ensure ongoing high efficiency and compliance in luxury/commercial spaces

Firm pursues predictive energy modeling to minimize consumption and environmental footprint