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.


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.

Our vision

To transform the human experience through the power of design

Our mission

To create innovative, thoughtful and sustainable solutions with our clients

Our guiding principles

Our customer, first
We work every day knowing that we exist for our clients.

Innovative by design
We make design excellence the constant.

Ethical always
We insist on the highest moral standards from ourselves and others.

Fair and inclusive
We respect everyone and appreciate the value in diversity.

We own the impact of our work.

Never stop learning
We bravely explore our curiosities.

Make it fun
We love what we do and celebrate the hard work.

Firm recognition

Architectural Record
16th – Top 300 Architecture Firms

Building Design+Construction
Giants 300
22nd – A/E Firms
1st – VA Facilities
2nd – Military
10th – Government
12th – Local Government
14th – Airport
15th – Religious
16th – State Government
18th – Cultural
19th – Industrial
20th – Healthcare
22nd – Hotel
24th – Reconstruction
27th – Federal Government
32nd – University
35th – Sports
37th – Multifamily
38th – Office
46th – Science & Technology
48th – Retail

Hotel Business Design
5th – Overall


BD World Architecture
Top 100
88th – Global
2nd – Healthcare
6th – Hospitality

Commercial Construction
Top Commercial Architects Report
5th – Overall
2nd – Healthcare
6th – Hospitality

Consulting-Specifying Engineer
88th – MEP Giants

Design Intelligence Research
31st – Multinational Design Firms

Engineering News-Record
Top 500 Design Firms
104th – Nationally

Interior Design
“Top 100” Giants
29th – Overall
14th – Hospitality
9th – Government

Media contact

Ignacio J. Reyes
Chief Development Officer