District leadership

About us
Michael A. Register

Michael A. Register, P.E.

Executive Director

St. Johns River
Water Management District
Mary Ellen Winkler headshot

Mary Ellen Winkler

Assistant Executive Director

St. Johns River
Water Management District
Headshot of Brad Purcell

Brad Purcell

Chief of Staff

St. Johns River
Water Management District
Headshot of Erich Marzolf

Erich Marzolf, Ph.D.

Director

Division of Water and
Land Resources
Headshot of Jeff Prather

Jeff Prather

Director

Division of Regulatory Services
Head shot of Dale Jenkins

Dale Jenkins, P.G.

Director

Division of Projects
Headshot of Clay Coarsey

Clay Coarsey, P.E.

Director

Division of Water Supply
Planning and Assessment
Erin Preston

Erin Preston

General Counsel

Headshot of Sam Gardner

Sam Gardner

Inspector General

Headshot of Tom Frick

Thomas Frick

Chief Resilience Officer

District organization

organization chart