(703) 709-2221 DUCinfo@downunderc.com Home About Us Services Safety Our Work News Blog Contact Contact Thank you for visiting our site. For additional information about DUC, feel free to contact us: Down Under Construction LLC Company Headquarters 10 Bryant Court Sterling, VA 20166 9435-A Washington Blvd N. Laurel, MD 20723 Tel: (703) 709-2221 Fax: (703) 709-5766 For general information on DUC, please fill out form on this page. Contact Us SEND MESSAGE  Headquarters Location 10 Bryant Court Sterling, VA 20166  Other Location 9435-A Washington Blvd N. Laurel, MD 20723  Tel: (703) 709-2221  Fax: (703) 709-5766  DUCinfo@downunderc.com For general inquiries  DUCestimating@downunderc.com For estimating, RFQs, RFPs, or project management inquiries.  BD@downunderc.com For business development or operations inquiries. COPYRIGHT © 2021 DOWN UNDER CONSTRUCTION. ALL RIGHTS RESERVED.

(703) 709-2221 DUCinfo@downunderc.com Home About Us Services Safety Our Work News Blog Contact About Down Under Construction Down Under Construction (DUC), a Hylan Company, was founded by Daryl Dunbar in 1993 and is headquartered in Sterling, Virginia. At the time, trenchless construction was in its infancy, and DUC began fostering the relationships the company still maintains today. Although the industry segments that DUC serves have grown, and the services offered diversified, the company has always held its client relationships and the quality of work performed paramount. Today, DUC serves the Federal Government, Land Developers, Utilities, and large Electrical Contractors. Our highly diversified client base demands multiple capabilities: Design, Engineering, and Permitting are all in-house DUC professional services that result in greater speed to market with higher quality production. LEARN MORE “We look forward to putting our knowledge and experience to work for your organization.” Daryl Dunbar, President, DUC Safety Down Under Construction applies a rigid system of control on operational safety during job planning, throughout construction, and beyond finalization of the project when the general public utilizes the infrastructure. Site safety plans are prepared for each individual project. The safety plans are reviewed by management and crew members together before starting work. Tool Box talks are routinely provided to reinforce basic safety practices. Site preparation, together with cleanup, are essential to maintain crew health and minimize hazards. Our objective is to leave the job site in a better state than when we began. LEARN MORE Our Services Contact Us SEND MESSAGE  Headquarters Location 10 Bryant Court Sterling, VA 20166  Other Location 9435-A Washington Blvd N. Laurel, MD 20723  Tel: (703) 709-2221  Fax: (703) 709-5766  DUCinfo@downunderc.com For general inquiries  DUCestimating@downunderc.com For estimating, RFQs, RFPs, or project management inquiries.  BD@downunderc.com For business development or operations inquiries. HYLAN COMPANIES By providing outstanding customer service we aim to create and maintain long-term relationships with you, our clients. COPYRIGHT © 2021 DOWN UNDER CONSTRUCTION. ALL RIGHTS RESERVED.