Jamie Lee Warn appeared before the Superior Number of the Royal Court after being found guilty of killing Zsuzsanna Besenyei in May 2018.
He was also sentenced for two counts of perverting the course of justice after making false statements to officers investigating the 37-year-old's disappearance and will spend at least 14 years and two months behind bars before being eligible for parole.
Crown Advocate Simon Thomas, prosecuting, said Warn had made attempts to cover up his offending by dumping the victim's car at the low-tide mark at La Haule at night to make it appear that she had taken her own life.
The Advocate added that he had also sent text messages from her phone in the days after her death to make it appear as if she was still alive – when he was in fact planning how to dispose of her body.
Warn, who was represented by Advocate James Bell, was initially found guilty on all charges in June 2019. However, he appealed and was granted a retrial. He was convicted again following a week-long trial last November.
The defendant told the court that he maintained his innocence and disagreed with the prosecution's version of events. He refused to appear in court as his sentence was read out.
Detective Chief Inspector Craig Jackson, who led the investigation said: 'This was a lengthy and complex investigation and those involved were committed to finding the truth. Warn went to considerable lengths to cover his tracks and avoid detection and the sentence today, shows the gravity of the crime.
'Although nothing will bring Zsuzsanna back, we hope this result goes some way to helping her family to heal and come to terms with life without Zsuzsanna. I would like to thank the Besenyei family for their patience and understanding throughout.'
Jurats Anthony Olsen, Jeremy Ramsden, Jane Ronge, Elizabeth Dulake and Steven Austin-Vautier were also sitting.
Full report: See tomorrow's [18 March] JEP.