Since 1946, hundreds of municipalities and businesses across the mid-Atlantic region have chosen ARRO as their trusted engineering partner.
Delivering and maintaining reliable infrastructure is one of the most important responsibilities facing today’s communities — and, at ARRO, we understand the complex mix of aging systems, funding pressures, and evolving regulatory requirements that come with it.
Civil–municipal engineering is where ARRO began, and it remains the cornerstone of our practice to this day. Our team brings unmatched insight into municipal needs, backed by the integrated expertise of a unified, cross-disciplinary staff capable of tackling a wide range of civil engineering challenges. Whether working with a township, a borough, a utility authority, or a private partner, we provide clear, practical solutions rooted in decades of experience.


We assist clients with every phase of planning, design, permitting, construction, and long-term system management. Our approach emphasizes responsive communication, reliable project delivery, and cost-effective solutions tailored to local priorities — no matter the scale or ownership of the project.
Our areas of expertise include:
- Stormwater management and MS4 program support
- GIS mapping, asset management, and technology-driven solutions
- Building code enforcement and inspection
- Sustainable landscape architecture for parks, trails, and community spaces
- Construction management and observation
- Comprehensive plan reviews for subdivision, land development, stormwater, utility, and zoning compliance
- Funding assistance and grant support
Learn more about these services by clicking the tabs below.

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