Thirty-Five years experience in the design of building systems, Diversified Engineering has successfully completed mechanical and electrical designs for new and existing facilities. DEI has served the needs of Government and Private Institutions such as the General Services Administration, U.S. Department of Energy and The University of Maryland.

Washington Dulles International Airport


Diversified Engineering has teamed with reputable Architectural and Engineering firms such as HNTB, Greiner, Inc. and Gensler to serve as the MEP Engineer of record for several projects:

Automated People Mover Tunnels and Vehicle Maintenance Facility:

A multi-million dollar project of tunnels, stations and maintenance facility, the Automated People Mover System at Dulles International Airport comprise of five major and distinct projects.

Baltimore Washington International Airport

  • West Utility Building Tunnel-piping utility tunnel
  • Pedestrian Walk-Back Tunnel
  • Domestic APM Tunnels, Tug Tunnels, and Baggage
  • Tunnels-Serving Domestic Passengers
  • International APM Tunnels-Serving International Passengers
  • APM Vehicle Maintenance Facility-Housing & Servicing APM cars
  • Reagan National Airport Hangars 3 and 5 Renovation
  • Washington Dulles International Airport Roadway Signage Project\
  • Washington National Airport (Reagan)
  • Martin State Airport
  • Baltimore Washington Airport Pier D/Y Addition
  • Baltimore Washington Airport Pier C Renovation
  • Baltimore Washington Airport Control Tower Power Upgrade
  • Baltimore Washington Airport Pier A Noise Monitoring Facility
  • Baltimore Washington Airport Terminal Extension; Henson (US Airways) Terminal