About us

LEO A DALY’s diverse and creative teams combine planning, architecture, engineering and interiors expertise to offer a holistic response to our clients’ challenges. For more than 100 years, we’ve created places that inspire wonder, connect communities and enable great things. Our design approach is energized by inquiry, focused on innovation and rooted in social and ecological responsibility.

Our vision

To transform the human experience through the power of design

Our mission

To create innovative, thoughtful and sustainable solutions with our clients


We design the future
New challenges demand new ideas. Learn more about LEO A DALY’s innovative projects and people.

Design impact

The world is our neighborhood
We own the impact of our work, socially and environmentally. Learn how LEO A DALY’s design impacts the world.

Our teams

An inclusive, inspired community 
We are united by a love of design. Learn about opportunities to join LEO A DALY’s global practice.

Founded in 1915 by Leo A. Daly, Sr., LEO A DALY is consistently ranked among the top design firms in the world. Our diverse portfolio includes projects in more than 91 countries, all 50 US states and the District of Columbia.

LEO A DALY rose to national prominence for pioneering the use of interdisciplinary project teams: a “whole project” approach that ensures maximum efficiency, coordination and client satisfaction. Today, under the leadership of Leo A. Daly III, FAIA, RIBA, FRAIA, we continue a legacy of innovation and commitment to client satisfaction, creating exceptional projects that enhance and enrich the human experience.

Our subsidiary Lockwood, Andrews & Newnam, Inc. (LAN), specializes in engineering, infrastructure consulting and program management.

Firm recognition

Architectural Record
16th – Top 300 Architecture Firms

Building Design+Construction
Giants 300
15th – A/E Firms
1st – VA Facilities
4th – Military
8th – Religious
10th – Transit
11th – Industrial
11th – Airport Terminal
12th – Government
14th – Reconstruction
14th – Local Government
16th – State Government
19th – Hotel
20th – Convention Centers
23rd – BIM Architecture
23rd – Healthcare
28th – International
30th – Office
31st – Federal Government
43rd – Sports
44th – Science & Technology
51st – Cultural
53rd – Green Architecture

Hotel Business Design
11th – Overall


BD World Architecture
Top 100
88th – Global
7th – Government
9th – Elderly Living
9th – Healthcare

Commercial Construction
Top Commercial Architects Report
4th – Overall
2nd – Federal
2nd – Healthcare
6th – Hospitality
6th – Multi-housing
9th – Restaurants

Consulting-Specifying Engineer
34th – MEP Giants

Design Intelligence Research
31st – Multinational Design Firms

Engineering News-Record
Top 500 Design Firms
78th – Nationally
16th – Water Treatment Plants
22nd – Healthcare
32nd – Water Supply
48th – General Building

Interior Design
“Top 100” Giants
25th – Overall
9th – Government
11th – Healthcare

Media contact

John McGauvran
Director of Marketing and PR