Amal Krishna Bose, 55, denied the offences, claiming some of the allegations did not happen or that it was just flirting or workplace banter.
He was found guilty of 12 counts of sexual assault on 19 June 2025, following a trial at Preston Crown Court.
The sexual assaults took place between August 2017 and December 2022.
Sacha Coyne, Senior Crown Prosecutor for CPS North West's Rape and Serious Sexual Offence Unit, said: ‘Amal Bose was in a trusted position at the hospital. He abused this by creating a toxic environment, making sexual comments and sexually assaulting five women who worked at the hospital.
‘He appeared not to recognise the serious and lasting impact his actions would have, describing his behaviour at trial as "workplace banter".
‘I would like to thank the women for supporting the prosecution, and I hope now Bose has been brought to justice they can find some closure.'
Maggie Oldham, chief executive at Blackpool Teaching Hospitals, said: ‘Our thoughts remain with all those affected by the actions of Mr Bose, and we thank our staff for the bravery and courage they have shown throughout the police investigation and trial of Mr Bose.
‘As a trust, we have cooperated with the police throughout their investigation into Mr Bose who has not worked at the trust since December 2022. We have been truly shocked and saddened by the experiences of the victims, and we will now be supporting all colleagues as we move forward together.'