A decorated Fire Department EMT yesterday was arrested for five Brooklyn sex assaults — including an attack on an 11-year-old girl, cops said.

Angus “Ricky” Pascall, 33, was busted at his Brooklyn workplace after three victims identified him in line-ups, officials said.

Pascall already was on modified duty because of a January arrest for allegedly beating up his girlfriend, the Fire Department said.

Cops believe the East Flatbush resident began his sex-crime spree with a single attack in 2001 — then waited eight years before striking twice in 2009 and in two more times this month, on July 11 and Monday.

In the most recent assault, a 20-year-old woman told cops she was raped by a gun-toting man who forced her into a Nissan Maxima. The woman noted the license-plate number, which led cops to Pascall.