David Fuller, 67, beat and strangled to death Wendy Knell, 25, and Caroline Pierce, 20, before sexually assaulting them in two separate attacks in Tunbridge Wells in 1987.
He later went on to abuse bodies in mortuaries in hospitals where he worked as an electrician.
For those offences he will also serve an additional 12 years in prison.
Fuller was caught 33 years after the Tunbridge Wells murders after a DNA breakthrough and a search of his home revealed he had recorded himself abusing bodies in the mortuaries of hospitals over more than a decade.
The former hospital electrician changed his plea to guilty days into his Maidstone Crown Court trial earlier this year and admitted that he murdered Ms Knell and Ms Pierce after previously admitting manslaughter by diminished responsibility.
He also pleaded guilty to 51 other offences, including 44 charges relating to 78 identified victims in mortuaries of Tunbridge Wells Hospital and its forerunner the Kent and Sussex Hospital between 2008 and November 2020.
He had worked at both hospitals and had filmed himself carrying out the attacks.
Investigators have so far detected around 100 potential victims but admitted all their identities may never be known.
Fuller was arrested on December 3 last year following new analysis of decades-old DNA evidence, which linked him through his brother to the killings.
Before she passed sentenced, Mrs Justice Cheema-Grubb QC heard victim statements including from the mothers of the two murdered women, as well as from people whose family members were victims of his hospital crimes.
Katrina Frost, the mother of Caroline Pierce, described Fuller as ‘an animal’ who ‘returned to a normal life with his family’ after her daughter’s murder, she said.
The judge also heard from the mother of a nine-year-girl, whose daughter’s body was attacked by Fuller at Tunbridge Wells Hospital where it ‘was supposed to be a safe place’.
An independent inquiry was triggered following the culmination of Fuller’s trial earlier this year. It will investigate how he went undetected committing his crimes for so long.
In passing sentence, Mrs Justice Cheema-Grubb praised the ‘meticulous work of police officers and scientists’ that allowed the prosecution to happen and told Fuller his hospital crimes had left ‘so much sorrow in the community’.
She added: “The offences committed in the mortuaries involved an astonishing breach of trust and invasion of privacy, that was repeated so much that it became habitual.
“You had no regard for the dignity of the dead.”
She said as there were no sentencing guidelines for his mortuary offences, the sentences for these offences would run concurrently.
He was sentenced to 12 years for these crimes in addition to two whole life terms for the two murders and will never be elligbile for parole.
