STAMFORD — A total of 20 firefighters were elevated in rank Wednesday in the largest promotion ceremony in the department’s 132-year history.

Nine captains and 11 lieutenants were sworn in to their new positions by Mayor David Martin at the government center.

Those promoted are captains Ryan Kerwin, Theodore Valenti, Andrew Perry, Carl Alton, Michael McCullagh, Shawn Sasser, Joseph Dombrowski, David Davis, William O’Connell; and lieutenants Brian Teitelbaum, Donald Lowndes, Thomas Newman, Steven Klee, Thedore Stanek, David Williamson, Michael Sloditskie, Adam Sliverstone, Joseph Maida, Kevin Connell and Martin Bucci.