Ronan was appointed chairman of the MTA — then known as the Metropolitan Commuter Transportation Agency — in 1965 by Gov. Nelson Rockefeller.
Since January, Prendergast had served as the MTA interim executive director. He succeeded Joseph Lhota, a Republican who resigned from the position to run for mayor of New York City.
Governor Andrew Cuomo on Tuesday appointed a new chairman for the Long Island Power Authority in an effort to stabilize the utility company amid investigations in the wake of Superstorm Sandy, according to a published report.
Twitter Chairman Jack Dorsey made the announcement Thursday with Mayor Michael Bloomberg.
Cherkasky was appointed by Gov. David Paterson in 2009. The agency later recommended $90,000 in civil penalties against Paterson for soliciting and accepting Yankees baseball tickets before belatedly paying for them.