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About EPA

Organization Chart for the Center for Environmental Measurement and Modeling (CEMM)

Organization chart showing divisions and branches within EPA’s Center for Environmental Measurement and ModelingView full size organization chart graphic.

Office of the Director

Director: Tim Watkins
Deputy Director: Alice Gilliland
Associate Director: Andrew Gillespie
Associate Director: William Fisher

About the Center for Environmental Measurement and Modeling

Air Methods and Characterization Division

Director: Lara Phelps
Associate Director: Valerie Cover

About the Air Methods and Characterization Division

Ambient Air Branch

Branch Chief: Surender Kaushik

Combustion Source Branch

Branch Chief: Rebecca Dodder

Source and Fine Scale Branch

Branch Chief: Richard Shores

Atmospheric and Environmental Systems Modeling Division

Director: Alan Vette
Associate Dir: Tom Pierce

About the Atmospheric and Environmental Systems Modeling Division

Atmospheric Chemistry and Aerosol Branch

Branch Chief: Donna Schwede

Atmospheric Dynamics and Meteorology Branch

Branch Chief:  Tanya Spero

Emissions Systems Analysis Branch

Branch Chief: Jacky Rosati

Natural Systems Characterization Branch

Branch Chief: William Yelverton

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Atlantic Coastal Environmental Sciences Division

Director: Wayne Munns

About the Atlantic Coastal Environmental Sciences Division

Ecosystem Management and Restoration Branch

Branch Chief: Marnita Chintala

Monitoring and Assessment Branch

Branch Chief: Timothy Gleason

Ecological Effects Branch

Branch Chief: Barbara Bergen

Watershed and Estuarine Diagnostics Branch

Branch Chief: Betty Kreakie

Gulf Ecosystem Measurement and Modeling Division

Director: Beth George

About the Gulf Ecosystem Measurement and Modeling Division

Biological Effects and Population Response Branch

Branch Chief: Janet Nestlerode

Ecosystem Assessment Branch

Branch Chief: Lisa Smith

Ecosystem Dynamics and Effects Branch

Branch Chief: Yongshan Wan

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Watershed and Ecosystem Characterization Division

Director: Kevin Oshima
Associate Dir: Tom Behymer

About the Watershed and Ecosystem Characterization Division

Biological Measurements Branch

Branch Chief: Eric Villegas

Ecosystem Condition Branch

Branch Chief: Brent Johnson

Multimedia Methods Branch

Branch Chief:  Myriam Medina-Vera

Watershed Management Branch

Branch Chief: Michael Elovitz

Ecosystem Processes Division

Director:  Brian Schumacher

About the Ecosystem Processes Division

Chemical Processes and Systems Branch

Branch Chief : Caroline Stevens

Landscape and Aquatic Systems Modeling Branch

Branch Chief : John Johnston