McDonnell Landscape Inc. is an award winning commercial landscape company with extensive experience in building some of Washington's most prestigious projects. Since 1983, we have provided our clients with the highest quality materials and craftsmanship. Our portfolio includes: The White House, Jefferson Memorial, DC Nationals Baseball Stadium and The Lincoln Memorial. In addition, The Associated Builders and Contractors recently awarded McDonnell Landscape Inc. with the Excellence in Construction Award for The Washington Canal Park located in Southeast Washington, DC. We have received Craftsmanship awards for The National Gallery of Art Sculpture Garden, The Victims of Communism Memorial and The National Garden located on the Mall.

About McDonnell Landscape, Inc.
Since 1983, McDonnell Landscape Inc. has provided total grounds maintenance, landscape installation, and snow removal services to demanding clients. Looking for proven ability to handle large, high-profile projects? We’ve worked at the White House, the Capitol, the Lincoln Memorial, the Jefferson Memorial, and the Smithsonian Institution. Need a firm that can provide high-quality service over a large area? We’ve handled the George Washington and Clara Barton Parkways, plus, we provide grounds maintenance to large counties with buildings and roadways spread over extended areas.

McDonnell Landscape, Inc. is a Maryland Corporation headquartered in Brookeville. Our seasonal satellite offices further support clients in the Baltimore - Washington Area, Virginia, West Virginia, Pennsylvania, New Jersey, and Delaware. With our seasoned management team, trained grounds maintenance staff, snow removal staff, and full complement of equipment, we are equipped to provide reliable, high-quality services.

McDonnell Landscape Experience

Project Management Approach

McDonnell Landscape, Inc. can maximize the beauty of your properties, eliminate grounds maintenance worries, and provide maximum financial value for the services performed.

Timothy McDonnell

Jorge Lopez

Vice President of Operations


Mr. McDonnell founded the company in 1983 and has directed its successful growth as a provider of grounds maintenance, landscape, and snow removal services. Mr. McDonnell attended the University of Maryland and holds several licenses and certificates, including:

  • Certificate Holder Master Gardener, University of Maryland at College Park Agriculture Extension
  • Virginia Certification Pesticide Application Permit
  • Washington Chapter ABC Construction Document Certification
  • Maryland Department of Agriculture Certification License III A.C.
  • Virginia Class A Certified Contractor
Mr. Lopez has been with McDonnell since 1983, when he started as a grounds maintenance foreman and supervisor. Mr. Lopez has managed demanding projects for a wide range of clients, including the U.S. Naval Academy and the Humphrey’s Engineering Center (for the U.S. Army Corp of Engineers). As Vice President for Operations, Mr. Lopez oversees all McDonnell’s projects to ensure that their performance meets customer requirements.


Construction Landscape


McDonnell Landscape Inc. has extensive construction experience working with The Washington DC Metropolitan Areas largest General Contractor’s. Some of our clients include:

  • Lend Lease, Inc.
  • Clark Construction Group, LLC
  • Coakley & Williams Construction
  • Forrester Construction Company
  • Grunley Construction, Inc.
  • Harkins Builders, Inc.
  • Heery International
  • Hensel Phelps Construction Company
  • Kiewit Construction Co.
  • Manhattan Construction Company
  • Perini Building Company
  • Sigal Construction Corporation
  • The Whiting Turner Contracting Co.
  • Turner Construction Company
  • W.M. Schlosser Company, Inc.
  • Walsh Construction Co., Inc.
McDonnell Landscape, Inc. has the experience it takes to manage the largest federal programs.

  • Jefferson Memorial
  • Lincoln Memorial
  • National Portrait Gallery
  • White House
  • Old Executive Office Building
  • Vice President's Residence
  • The Smithsonian
  • National Gallery of Art
  • The National Air and Space Museum
  • John F. Kennedy Gravesite
  • National Arboretum
  • C & O Canal Restoration
  • Bolling Air Force Base
  • Andrews Air Force Base