The court previously heard how the former East of England Ambulance Service call handler had told the women he was a paramedic.
The prosecution told the jury that he used stickers on his work ID card to hide his more junior role.
Kadolski was accused of 15 sexual offences, but on two charges the jury has been told that he had no case to answer.
He was found guilty of three counts of rape and six sexual assaults. He was cleared of two counts of rape and two other assaults.
Det Con Claire Floyd paid tribute to the "courage" shown by Kadolski's victims.
"[I] hope that today's verdict will bring a small measure of comfort that justice has been delivered," she said.
"I also hope it encourages anyone else who is a victim of this type of offence to have the confidence to come forward.
"I don't underestimate the strength it takes to report sexual offences – but today's verdict shows we do take these reports seriously, and that we are dedicated to bringing predatory and remorseless offenders like Kadolski before the courts."