hi, here is organizational structure of NASA along with the chart i hope it can be useful to you.
NASA Organization Structure
Office of the Administrator
Administrator: Charles F. Bolden, Jr.
Deputy Administrator: Lori B. Garver
Associate Administrator: Christopher Scolese
Chief of Staff: David Radzanowski
Associate Deputy Administrator: Charles H. Scales
Assistant Associate Administrator: Christyl Johnson
White House Liaison/Deputy Chief of Staff: David Noble
Advisory Groups
NASA Advisory Council (NAC)
Chairman: Dr. Kenneth Ford
Aerospace Safety Advisory Panel (ASAP)
Chairman: Vice Admiral Joe Dyer USN, (Ret)
Office of the Inspector General
Inspector General: Paul K. Martin
Administrator Staff Offices
Chief Financial Officer / Agency Chief Acquisition Officer: Elizabeth Robinson
Chief Information Officer: Linda Cureton
Chief Scientist: Vacant
Chief Technologist: Robert D. Braun
Innovative Partnerships Program: Douglas Comstock
Chief Engineer: Michael Ryschkewitsch
Chief Health and Medical Officer: Richard Williams
Chief, Safety and Mission Assurance: Bryan O'Connor
Independent Program and Cost Evaluation
Associate Administrator: W. Michael Hawes
Diversity and Equal Opportunity:
Associate Administrator: Brenda Manuel
Education:
Associate Administrator: James Stofan (Acting)
International and Interagency Relations:
Associate Administrator: Michael F. O'Brien
General Counsel: Michael Wholley
Legislative and Intergovernmental Affairs:
Associate Administrator: L. Seth Statler
Office of Communications
Associate Administrator / NASA Press Secretary: Robert Jacobs (Acting)
Small Business Programs:
Associate Administrator: Glenn Delgado
Mission Directorates
Aeronautics Research
Associate Administrator: Jaiwon Shin
Exploration Systems
Associate Administrator: Douglas Cooke
Science
Associate Administrator: Ed Weiler
Space Operations
Associate Administrator: William Gerstenmaier
Mission Support Offices
Mission Support Directorate
Associate Administrator: Woodrow Whitlow
Human Capital Management:
Assistant Administrator: Toni Dawsey
Strategic Infrastructure:
Assistant Administrator: Olga Dominguez
Headquarters Operations:
Executive Director: Chris Jedrey
NASA Shared Services Center:
Executive Director: Richard Arbuthnot
Agency Operations
Assistant Administrator: Tom Luedtke
Internal Controls and Management Systems:
Assistant Administrator: Lou Becker
Procurement:
Assistant Administrator: Bill McNally
Protective Services:
Assistant Administrator: Jack Forsythe
NASA Management Office:
Director: Dr. Trinh
http://www.nasa.gov/pdf/433034main_Agency_Org_Structure_3-23-2010.pdf