Mr. Stephenson founded Cube Root in 2010 in Maryland with a dream to bring high-quality engineering services to market. As a Jamaican immigrant to the United States and the son of a Jamaican merchant, he embodies the entrepreneurial spirit. Under his leadership, Cube Root has grown from a one-person operation to a team of over 60.He has formed relationships with government agencies, contractors, architects, and other corporations to provide his expertise on water, wastewater, transportation, and infrastructure projects. He has successfully procured and led projects with DC Water, DC District Department of Transportation (DDOT), DC Department of General Services (DGS), DC Public Libraries, Potomac Electric Power Company (PEPCO), the U.S. General Services Administration (GSA), Jacksonville Transportation Authority (JTA), the U.S. Virgin Islands Department of Education (VIDE), and the Ministry of Health and Wellness (MOHW), Jamaica.

He holds a Master’s degree in Engineering and a Bachelor’s degree in Civil Engineering from Howard University, with a major in Transportation and a minor in Structures, and Transportation Asset Management. Mr. Stephenson earned a diploma in Land Surveying from the University of Technology (UTECH), Jamaica, and has worked as a licensed professional engineer in Jamaica. He provided construction supervision and engineering land surveying on the Ocho Rios Sewage project in Jamaica. Similar services were rendered for the South Coast Sewer project in Barbados. The scope of the project included gravity-fed, open-cut sewer pipe construction along with the installation of pumping mains along a new alignment through a major tourist district to feed the treatment plant with a marine outfall at the northern and southern coasts. Barbados generates over 70% of its annual revenue as a tourist destination. That fact, coupled with a changing and challenging geotechnical substrata, challenged designers and construction personnel alike. The infrastructure construction activities could not negatively impact the local resort districts during construction. To achieve this requirement, designers specified the installation of over 3 miles of infrastructure construction to be completed using Micro Tunneling. 

His experience with managing healthcare projects includes serving as principal-in-charge for the redevelopment of the St. Elizabeths East Hospital Campus in Washington, DC. The contract involves providing program management support services contract to assist the District in the planning, design management, construction management and project controls, commissioning, and occupancy for the phased redevelopment of the 180-acre East Campus. The historic campus’s unique setting could offer over five million square feet of mixed-use development. The project consists of multiple phases including roadway infrastructure; new hospital water service; campus microgrid system; parking garages; hospital site development, tower, and main building; and new ambulatory care center. 

In 2023 Cube Root received the 2023 CMAA Overall National Project Achievement Award for Transportation with Construction value less than $50 Million for the Pecan Street Infrastructure Improvement Project. Pecan Street provides critical access to the new Cedar Hill Regional Medical Center (CHRMC). When the hospital  is completed in 2024, it will provide medical services to the residents of Ward 8, the most underserved Ward in Washington, DC. Along with providing medical service access, Pecan Street provides additional access for patrons of the District’s Entertainment Sports Arena along with a dedicated parking garage for the existing St. Elizabeths Hospital to address parking limitations within their boundaries.