Executive Committee
The governing body of ECOS, other than the general membership, is the Executive Committee, composed of the officers, the chairs/vice chairs of the standing committees, one primary and one alternate State representative from each EPA region, one State representative from the non-contiguous States and territories, and two liaison officials with the National Governors' Association.
As of 5/9/07
| Officers | Title | Name |
| President | David Paylor, Virginia | |
| Vice-President | Stephen Owens, Arizona | |
| Secretary-Treasurer | Michael Linder, Nebraska | |
| Past President | Robert King, South Carolina | |
| Committees | Chair | Vice-Chair |
| Air | Doug Scott, Illinois | Toni Hardesty, Idaho |
| Water | Amey Marella, Connecticut | Tom Easterly, Indiana |
| Waste | John Corra, Wyoming | Jay Ringenberg, Nebraska |
| Compliance | Mike Linder, Nebraska | Lisa Jackson, New Jersey |
| Planning | Wayne Gieselman, Iowa | Thomas Burack, New Hampshire |
| Cross-Media | David Littell, Maine | Shari Wilson, Maryland |
|
Region |
Primary |
Alternate |
| I | Thomas Burack, New Hampshire | Amey Marrella, Connecticut |
| II | Lisa Jackson, New Jersey | Alexander "Pete" Grannis, New York |
| III | Bob Zimmerman, Delaware | Barbara Sexton, Pennsylvania |
| IV | Paul Sloan, Tennessee | Trudy Fisher, Mississippi |
| V | Steve Chester, Michigan | Tom Easterly, Indiana |
| VI | Steve Thompson, Oklahoma | Teresa Marks, Arkansas |
| VII | Doyle Childers of Missouri | John Mitchell of Kansas |
| VIII | Richard Opper of Montana | John V. Corra of Wyoming |
| IX | Leo Drozdoff of Nevada | Steve Owens of Arizona |
| X | Toni Hardesty of Idaho | Jay Manning of Washington |
| Islands | Vacant | Laurence Lau of Hawaii |
| NGA Liaison | Stephanie Timmermeyer of West Virginia | Larry Hartig of Alaska |