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April 1-3, 2025
Hilton University of Houston
Houston, TX

Mark Longridge

Mark Longridge

Capital Project Manager
Waterfront Project Management Group
Port of Seattle


Mark Longridge is a Capital Project Manager with the Waterfront Project Management Group of the Port of Seattle. He has 30 years of experience in civil construction and over 20 with the Port managing industrial moorage, recreational facility and maritime heavy civil work. He is a graduate of the University of Washington Civil Engineering program with a minor in architecture.

Among his current projects Mr. Longridge is managing the Port’s Pier 66 Cruise Shore Power project, using an innovative solution to bring shore power for Cruise vessels to the downtown central waterfront berth using a submarine cable from another of the Port’s terminals. The project is in construction now and will be operational within the upcoming cruise season.

Mr. Longridge lives on Bainbridge Island with his family and is a regular Washington State Ferry commuter. He is a licensed commercial drone pilot, and an avid motorcyclist and traveler.