Dewberry

Fairfax, VA

Family Owned. Client Centric. Community Driven.

Services: 31
Offices: 1
Projects: 38
Leaders: 4
Founded: 1956
Size Estimate: 2,500+ employees

Overview

Dewberry is a family-owned professional services practice providing architecture, engineering, environmental, geospatial, construction, planning, consulting, and technology services. It serves federal, state, local government, and private-sector clients across natural and built environments from more than 50 locations.

Founded: 1956
Size Estimate: 2,500+ employees

Services

Architecture

Delivers comprehensive architectural design, planning, and interior design services across community, educational, and commercial facilities.

Architectural Design Interior Design Space Planning and Programming Sustainable Design

Engineering

Provides multidisciplinary engineering solutions for civil, structural, transportation, and water infrastructure programs.

Multidisciplinary Civil Structural Transportation Systems Engineering Water Engineering Energy Engineering Federal Engineering

Environmental

Navigates environmental planning, regulatory compliance, and restoration challenges.

Environmental Planning and Permitting Hazardous Waste Assessment and Remediation Stream and Ecosystem Restoration Sustainability Planning Natural Resources Services

Construction

Supports project delivery and construction management for natural and built environments.

Geospatial, Mapping, and Survey

Collects and processes location data using advanced airborne lidar, remote sensing, photogrammetry, and survey tools.

Airborne Lidar Surveys Drone and sUAS Mapping Photogrammetric Mapping

Planning, Consulting, and Advisory

Provides land use, community planning, and program management services.

Land Use Planning Community Planning Program Management

Technology

Develops geospatial applications, data analytics workflows, and custom technology solutions.

Geospatial Application Development AI and Machine Learning Data Analytics and Visualization

Firm type

Architecture & Engineering Civil Engineering Structural Engineering Environmental Engineering Water / Wastewater Engineering Land Surveying Transportation Engineering Design-Build

Projects

New York City Housing Authority Clinton Houses Stormwater Resilience

New York, New York | New York City Housing Authority | Stormwater & Flood Control

Big Bend Road Design-Build

Gibsonton, Florida | Highways & Roads

James River Crossing

Newport News, Virginia | Bridges

Joanne B. Wagner Community Center

Elmhurst, Illinois | Sports & Recreation

Wacissa Springs Restoration

Jefferson County, Florida | Environmental & Remediation

Carbon Reduction Strategy and Photovoltaic Assessment

Connecticut | Solar

Coastal Protection and Salvage Archaeology

Brick and Mantoloking, New Jersey | Environmental & Remediation

Accotink Creek Stream Restoration and Stabilization

Fairfax, Virginia | Environmental & Remediation

U.S. Fish and Wildlife's National Wetlands Inventory

Sacramento, California | U.S. Fish and Wildlife Service | Federal

Build It Back Post-Disaster Recovery Program Support

New York, New York | Water Resources

Angler's Park Wetland Mitigation

Danville, Virginia | Environmental & Remediation

Poinciana Parkway Design-Build

Kissimmee, Florida | Highways & Roads

Cane Creek Centre Environmental and Engineering Services

Danville, Virginia | Environmental & Remediation

Cobbs Creek Stream Corridor Restoration

Philadelphia, Pennsylvania | Environmental & Remediation

NCDOT Aquatic Survey Projects

North Carolina | North Carolina Department of Transportation | Highways & Roads

sweetgreen

Nationwide | sweetgreen | Retail

OSU North Hall and State Medical Examiner's Office

Tulsa, Oklahoma | Oklahoma State University | Education

Pekin Insurance Corporate Headquarters

Pekin, Illinois | Pekin Insurance | Commercial

Venice Public Safety Facility

Venice, Florida | Public Safety

Houston Methodist Hospital Outpatient Center Orthopedic Sports Medicine Clinic

Houston, Texas | Houston Methodist Hospital | Healthcare

Countryside City Hall and Police Headquarters

Countryside, Illinois | Public Safety

Loudoun County Courts Complex Expansion, Phase III

Leesburg, Virginia | Justice & Corrections

River District Tower

Danville, Virginia | Commercial

GSA Federico Degetau Federal Office Building and Nazario Courthouse

Hato Rey, Puerto Rico | GSA | Federal

Mayo Clinic - Dan Abraham Healthy Living Center

Rochester, Minnesota | Mayo Clinic | Healthcare

Bradley University Business & Engineering Convergence Center

Peoria, Illinois | Bradley University | Education

Oklahoma Psychiatric Care Center

Tulsa, Oklahoma | Oklahoma Psychiatric Care Center | Healthcare

Climate Change Planning for Airports

Nationwide | Aviation

USGS National Enhanced Elevation Assessment

Nationwide | USGS | Federal

Florida Statewide Mapping

Florida | Government

Georgia Hurricane Evacuation Study

Georgia | Government

DHS/FEMA Puerto Rico Disaster Housing Recovery Plan

Puerto Rico | DHS/FEMA | Federal

USACE St. Louis District Photogrammetric and Lidar Surveying and Mapping Program

St. Louis, Missouri | USACE St. Louis District | Federal

Prince William County Service Authority Asset Management

Prince William County, Virginia | Prince William County Service Authority | Water Resources

Mission Hospital Facility-Wide Engineering Systems Assessment

Asheville, North Carolina | Mission Hospital | Healthcare

Mapping Alaska-America's Last Frontier

Alaska | Government

Northeastern Transmission Line Mapping

Mid-Atlantic Region | Power Transmission & Distribution

Post-Hurricane Harvey Disaster Analytics

Houston, Texas | Federal

Credentials and affiliations

Awards

ENR Top 500 Design Firms #35 (2025)

Leadership

David J. Mahoney

Chief Executive Officer

Erica Nelles

Architecture Service Group Leader

AIA

Ileana Ivanciu

Environmental Service Group Leader

PhD

Paul Dean

Technology Service Group Leader

Publications

Delivering Water Resilience at Twentynine Palms

article | 2026

View publication

Sustainable Design and Paradigm Shifts within Corrections

article