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 Erich Marzolf

Erich Marzolf, Ph.D.

Director

Division of Water Resources
Headshot of Jeff Prather

Jeff Prather

Director

Division of Regulatory Services
Head shot of Dale Jenkins

Dale Jenkins, P.G.

Director

Division of Infrastructure and Land Resources
Headshot of Clay Coarsey

Clay Coarsey, P.E.

Director

Division of Water Supply
Planning and Assessment
Michelle Brown headshot

Michelle Brown, P.E.

Director

Division of Basin
Management and Modeling
Erin Preston

Erin Preston

General Counsel

Headshot of Tom Frick

Thomas Frick

Chief Resilience Officer

Headshot of Sam Gardner

Sam Gardner

Inspector General

District organization