The 5 Best Engineering Firms Around Frederick

When infrastructure, commercial development and built-environment projects anchor the growth of a region, the Best of the Best turns a spotlight on the engineering firms in Frederick that drive progress through technical skill, regulatory know-how and local insights. According to industry data, engineering and design firms that integrate site planning, structural systems and permitting early can reduce project delays by up to 30 percent—a difference that matters when timelines are tight.

Advanced Consulting Engineers, P.A.

Advanced Consulting Engineers, P.A. was founded in 1994 with a focus on full-service structural engineering. They emphasize the use of modern materials and technologies, including cold-formed steel framing, to give architects and developers more flexibility in design. Their project portfolio covers commercial, residential, parking facilities, healthcare and education sectors. With a Frederick office, they bring regional proximity plus specialized structural capabilities to projects of varying scale.

CAS Engineering

CAS Engineering is a civil engineering and surveying firm whose Frederick office is housed in a renovated historic downtown building—awarded for the restoration effort. The firm provides site design, land surveying, feasibility studies and municipal permitting, with a strong emphasis on infill and urban renewal redevelopment. Their internship program and staff development reflect a long-term investment in the next generation of engineers and planners.

Harris Smariga & Associates, Inc.

Established in 1978, Harris Smariga & Associates operates in civil engineering, land planning, project management and surveying across all phases of land development. Their team underscores deep familiarity with entitlement and regulatory processes, helping clients navigate complex municipal reviews and approvals. For projects involving major site development—from residential subdivisions to commercial parks—the firm offers seasoned experience in the local development landscape.

Hillis-Carnes Engineering Associates, Inc.

Hillis-Carnes Engineering Associates markets itself as a multi-specialty engineering firm with geotechnical and geostructural capabilities. Their Frederick presence supports services such as subsurface exploration, soil stabilization, construction materials testing and forensic engineering. The firm meets the needs of transportation, institutional, industrial and recreational clients by combining field investigation, laboratory testing and analytical design under one roof.

Specialized Engineering

Specialized Engineering is an employee-owned consulting firm that provides geotechnical engineering, construction materials testing, inspection and environmental consulting services. Their Frederick lab holds AASHTO accreditation for asphalt, concrete and soils testing. By coupling laboratory capabilities with on-site inspection services, they help owners and contractors reduce risk, control costs and verify quality during the build phase.

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