The SDNS responsibilities and procedures document delineates each officer's duties.
If you are interested in any position or would like to nominate some other specific individual, please contact a member of the Committee on Officer Nominations. The committee initiates deliberations on candidates for next year's elections in the late summer timeframe, and generally submits the finalized slate to ASA in November.
The ASA Council of Sections offers several resources for Section Officers. They can be found here.