The list of major railroad design services performed by WSP SELLS is extensive. It includes rail design and rehabilitation, station and platform design, elimination of grade crossings, and structural analysis and design services.

With more than fifty years of rail experience, notable clients include the New York and Connecticut State Departments of Transportation, the U.S. Naval Facilities Engineering Command, Metro North, the Long Island Railroad, New York City Transit Authority, New Jersey Transit Authority, and Amtrak.