Stephanie Singer, a mathematician and Democratic ward leader who got involved in politics less than a decade ago, will be the next chair of the Philadelphia city commissioners, in charge of running the city's elections.

The two newly-elected commissioners, Singer and Republican Al Schmidt, joined the re-elected Democratic incumbent, Anthony Clark, at a joint news conference today to endorse Singer for chairman and commit themselves to making the office more transparent and effective.

Singer will replace Margaret "Marge" Tartaglione, a fixture in the commissioners' office since 1976, as the agency's leader. Singer defeated Tartaglione in the Democratic primary last May.

The new commissioners named an advisory group headed by  attorney Gregory Harvey to aid their transition effort.