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J. M. (Mike) McCoshen

Administrator

J. M. (Mike) McCoshen serves as the twelfth Administrator of the Great Lakes St. Lawrence Seaway Development Corporation (GLS), an operating administration of the U.S. Department of Transportation. Appointed by President Donald J. Trump on June 16, 2025, Administrator J. M. (...

Sylvonica Madlock

Executive Officer

Sylvonica Madlock serves as Executive Officer at the Great Lakes St. Lawrence Seaway Development Corporation, appointed in March 2023.  As Executive Officer, Ms. Madlock directs operations, oversees employee engagement, and collaborates with stakeholders...

Jeffrey Scharf

Associate Administrator

Jeffrey Scharf joined the GLS in 2012 and served as the organization’s Chief Engineer and Director of Engineering and Maintenance for several years.  He led the GLS team responsible for managing the Corporation’s facilities, which include two locks and...

Kevin O'Malley

Strategic Advisor for Financial and Resources Management

Kevin O’Malley serves as the GLS’s senior career executive on budget, information technology (IT), and strategic and pe​rformance planning issues since January 2000. 

Mr. O’Malley is responsible for developing the GLS’s...

Anthony Fisher

Deputy Administrator

Anthony Fisher joined the Great Lakes St. Lawrence Seaway Development Corporation (GLS) in March of 2023.  As a federal corporation, GLS operates and maintains the U.S. infrastructure and waters of the St. Lawrence Seaway, while also performing trade development...