Since our inception, TEI has continuously provided construction services to Federal and local government agencies, property managers/owners and General Contractors throughout the Washington DC Metropolitan area. Our impressive portfolio of satisfied customers includes:

Federal Government Agencies

  • National Institute of Standards & Technology (NIST)
  • General Services Administration (GSA)
  • Department of Veterans Affairs (VA)
  • Social Security Administration (SSA)
  • National Parks Service (NPS)
  • National Aeronautics and Space Administration (NASA)
  • Food and Drug Administration (FDA)
  • Department of Energy (DOE)
  • Federal Bureau of Investigation (FBI)
  • Internal Revenue Service (IRS)


  • Fort Detrick, Frederick, MD
  • United States Department of the Army
  • United States Army Corps of Engineers
  • United States Coast Guard

State and Local Government

  • City of Frederick Department of Public Works (DPW)
  • Maryland Department of Corrections
  • State of Maryland


  • Hagerstown Community College (HCC), Hagerstown, MD
  • Frederick Community College (FCC), Frederick, MD
  • Hood College, Frederick, MD
  • Shepherd University, Shepherdstown, WV
  • Washington County (MD) Public Schools
  • Montgomery County (MD) Public Schools
  • Frederick County (MD) Public Schools
  • Loudon County (VA) Public Schools


  • Allegis/Aerotek, Hanover, MD
  • AutoZone
  • BB&T Bank
  • Bechtel Power Corporation
  • Cambrex Laboratories

Medical Facilities

  • VA Medical Center, Miami, FL
  • Walter Reed Army Medical Center (WRAMC)
  • American Health Management Associates
  • Frederick Surgical Center
  • Frederick Primary Care

Data Centers

  • Verizon

General Contractors & Construction Managers

  • Allan Myers, Fallston, MD
  • Berry Construction Co., Chattanooga, TN
  • Capitol Rail Constructors, Herndon, VA
  • Cianbro Corporation, Baltimore, MD
  • Cindell Construction Co. Inc., Frederick, MD
  • Costello Construction Inc, Columbia, MD
  • Dubois Construction, Windsor Mill, MD
  • Forrester Construction, Rockville, MD
  • Gilbane Building Company, Baltimore MD
  • Hubert Construction, Gaithersburg, MD
  • Honeywell International, Columbia, MD
  • Kane Construction, Baltimore, MD
  • KBE Building Corporation, Frederick, MD
  • Keller Brothers Inc, Mount Airy, MD
  • Kinsley Construction, Lutherville-Timonium, MD
  • Leidos Biomedical Research, Frederick, MD
  • Lewis Contractors, Owings Mills, MD
  • LF Jennings, Falls Church, VA 
  • MacKenzie Contracting, Towson, MD
  • Manekin Construction, Columbia, MD
  • Mazzuca Contracting, Annapolis Junction, MD
  • MCN Build, Washington, DC
  • Morgan-Keller Construction, Frederick, MD
  • North Point Builders, Baltimore, MD
  • Partner Contracting, Baltimore MD
  • Paul Davis Restoration, Owings Mills MD
  • rand* Construction, Alexandria VA
  • Rycon Construction, Inc., Pittsburgh, PA
  • Sigal Construction Corporation, Washington DC
  • Southway Builders, Baltimore, MD
  • Wagman Construction Inc., York, PA
  • Warner Construction, Frederick, MD
  • Waverly Construction, Halethorpe, MD
  • Waynesboro Construction Co., Frederick, MD
  • Wilhelm Commercial Builders, Annapolis Junction, MD
  • Whiting Turner Contracting Company, Baltimore, MD
  • Wohlsen Construction, Baltimore MD