Endesco, Inc., founded in 1997, is a multi-disciplined engineering design, consulting, and construction management firm based in the Washington Metropolitan Area. We are certified as a small minority-owned disadvantaged business enterprise (MBE/DBE/SBE) with the Metropolitan Washington Unified Certification Program (DDOT and WMATA), MDOT, VDOT, PennDOT, NJDOT, NYDOT, TxDOT, and local counties and municipalities. See the full certification list.

    Endesco has a proven record of performing civil engineering projects ranging from simple design to highly complex analysis. During the past ten years, we have been actively working on major Design-Build projects in the region: Hampton Roads Bridge-Tunnel (HRBT) in Virginia, Inter-County Connector Contracts A and B in MD, the I-95 Express lanes Project in VA, the Washington Metro Silver Line/Dulles Metrorail Phase II Project, and the Purple Line in MD. The Inter-County Connector Contract B has been given the Best Transportation Engineering Project, 2012 Award for the Mid-Atlantic Region by the ENR.


    Our team is composed of registered Professional Engineers (PE), Ph.D.'s in engineering and science, licensed Project Management Professional (PMP), Certified Construction Managers (CCM), certified Project Scheduling Professional (PMI-SP), Professional Traffic Operations Engineers (PTOE), Geographic Information Systems Professionals (GISP), and Engineers In-Training (EIT).

    We understand what it takes to partner with the State DOTs, Counties and the Cities on task assignment contracts and possess relevant experience to provide technical services and obtain required field data. We have a proven management structure experienced in preparing task proposals, providing staff training to effectively implement our quality assurance program for field services, and employing financial controls for tracking costs, preparing invoices and optimizing team utilization. Our key mission is to provide excellence in client service and project delivery on time and within budget. We take proactive approach to plan, organize and provide leadership. We remain attentive to client and stakeholders' concerns and manage engineering projects from conception to completion placing special emphasis on safety, time, cost, quality and standard of services important to each client.


    I-270 at Watkins Mill Road Interchange, MDOT: 2021 MdQI Modal Over $5M Category

    Interstate 66 (I-66) / Route 15 interchange, VDOT: 2018 DBIA Design Build Project of the Year, 2018 VTCA Transportation Engineering Awards – Design Build Winner, 2017 HCCA Excellence in Infrastructure

    The Inter-County Connector Contract B, MDOT: The Best Transportation Engineering Project, 2012 Award for the Mid-Atlantic Region by the ENR

    I-95 Express Lanes, VDOT: 2015 America’s Transportation Awards, by AASHTO, AAA and the U.S. Chamber of Commerce

    Downtown DC Multimodal Signal Optimization Project, DDOT: 2021 ACEC Metro Washington Grand Award in Non-Design Category


    Endesco ensures nondiscrimination in all programs and activities in accordance with Title VI of the Civil Rights Act of 1964. If you need more information or special assistance for persons with disabilities or limited English proficiencies, contact our Human Resources Division at (301) 987-8776(TTY/TDD users, call 711).

    Endesco is an Equal Opportunity Employer.

  • Maryland Office (Headquarters):
    15245 Shady Grove Road, Suite 335
    Rockville, MD 20850
    Virginia Office
    4605-C Pinecrest Office Park Drive
    Alexandria, Virginia 22312

    Telephone: (01) 301-987-8776
    Fax: (01) 301-987-8777
    Email us