He also spoke about a "significant" impact on St John ambulance service colleagues. "The ambulance officers who gave evidence during your trial must be in disbelief now, knowing your offending took place while they were driving the ambulance."
The Judge was also unmoved by character references, including one from King's wife, which claimed the jury had got it wrong.
"The jury did not get it wrong. I note none of the character references are dated after you pleaded guilty."
Earlier this month, King also pleaded guilty to five counts of sexual assault on two girls aged 16 and younger in 2002 to 2006.
Judge Rea said the case was one of the worst of its kind to come before New Zealand's courts.
"This is the first case I am aware of that has seen a total breach of trust ... you repaid that trust by sexually molesting them.
"You do not have a previous good character. Over 11 years you sexually molested six different people. If there's remorse, it's far too late."
King was found guilty last month of eight charges relating to the indecent and sexual assault of four women, aged 15 to 57, in the back of his ambulance between January 2010 and June 2013 in Central Hawke's Bay.
Each of the women were in need of medical aid. They included a teenager who had been beaten by her boyfriend; a woman suffering depression and threatening to harm herself; a young woman with a terminal illness; and a woman who suffered from temporary paralysis.
Yesterday, the mother of the terminally ill victim, who passed away in February this year, said King abused her daughter's trust and "took advantage of her vulnerability and weakness".
"My daughter was very sick - you caused huge heartache and emotional pain to our family."
She said a "sense of dread" washed over the family every time her daughter required an ambulance. "We dreaded seeing you or bumping into you in our small community."
She said King's "lovely" wife and children have also suffered and were "victims as we are".
King did not have the "decency to plead guilty", and forced her family to endure the trial and publicity in the press, she said; and the "audacity" to go to the workplace of the ill woman's father.
Another victim said she had spent the past 10 years in counselling, "trying to escape the constant doubt" surrounding her.
Throughout the scandal King staunchly denied all the ambulance crimes, describing them during his police interview late last year as "bullshit".
Detective Grant Jarvis, who was in charge of the case, praised the courage of the victims, while St John territory manager for Hawke's Bay Brendon Hutchinson said justice had been served.
"Christopher King will feel the consequences of his actions by serving a lengthy sentence for his crimes," Mr Hutchinson said. "We hope this result will go some way towards repairing the damage he has caused to his victims and our thoughts are with them."
How it unfolded
*King began his career with St John as a volunteer in 2007, and started working fulltime in 2009.
*He married his current wife two years ago and was a respected member of the CHB community.
*He resigned in August last year, following the growing list of allegations.
*First victim: In February 2010 a Waipukurau woman, 43, who suffers from conversion disorder began experiencing stomach pain. King was one of three officers to arrive and treat her. King gave her Entonox gas and assaulted her on the way to the hospital.
*Second victim: A terminally ill 23, required hospitalisation for treatment on March 29, 2012. King molested her while on the way.
*Third victim: On June 23, 2013 a 57-year-old woman phoned 111 following a slip in the shower. King was one of two officers to attend. He violated her and then "bombarded" her with "very intimate" text messages and phone calls.
*Fourth victim: On July 24, 2013 a then 15-year-old girl phoned 111 after a domestic dispute. King arrived in a single crewed ambulance. He stopped on the side of the road, gave the teen Entonox, violated and filmed her, then again on arrival at the medical centre.
*Fifth and sixth victims: This month King admitted five counts of sexual assault against two girls aged 16 and younger in 2002 to 2006.
