Our Team

William Vliet

William A. Vliet, P.E.

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Daniel O'Neill

Daniel W. O’Neill, P.E.

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Mr. Vliet and Mr. O’Neill are licensed Professional Engineers, experienced in traffic and transportation engineering. They conduct traffic studies; analyze traffic flows and roadway requirements; and design roadway intersections and traffic signals. They are well versed in municipal and State permitting for site and roadway development. They have also been land surveyors, and inspectors on roadway and traffic signal construction projects.

They are ACTAR Accredited Traffic Accident Reconstructionists, providing accident evidence collection assistance to the Manchester Police Department and accident reconstruction services to private sector clients in both civil and criminal cases. Between them they have provided expert witness testimony in Connecticut and New Jersey courts, in federal court, and in Antigua & Barbuda, West Indies.