Houssam “Sam” Sleiman serves as executive vice president for national transportation at Suffolk. He is responsible for leading the company’s operations in the transportation sector and driving business development for aviation, port and railway projects nationally. Suffolk brought Sleiman on late last year after he spent nearly 30 years leading capital programs and environmental affairs at the Massachusetts Port Authority. Sleiman was named one of Engineering News- Record’s Top 25 Newsmakers of 2009 for pioneering the use of warm-mix asphalt on a U.S. runway.