is an engineer with Kittelson & Associates, Inc., a national consulting firm that provides transportation engineering, planning, and research services to government agencies, municipalities, and private organizations. Paul joined the firm's Portland, Oregon office in 1994 and works particularly in the areas of public transportation and multimodal operations, planning, and research. Since 2009, Paul has worked remotely from Denmark, where he both leads and supports a variety of projects across the firm.

Paul is the lead author of a number of guidebooks and manuals published by the Transportation Research Board, including Transit Capacity and Quality of Service Manual, 3rd Edition; A Guidebook on Transit-Supportive Roadway Treatments; and Guidebook on Pedestrian and Bicycle Volume Data Collection. He served as the research team's technical editor for both the Highway Capacity Manual, 6th Edition and the HCM 2010, and is a co-author of the Planning and Preliminary Engineering Applications Guide to the HCM. Paul chairs the TRB Committee on Transit Capacity and Quality of Service and is a member of the TRB Committee on Highway Capacity and Quality of Service, as well as a member of the Institute of Transportation Engineers and the Danish Society of Engineers.