The family of four obtained New Zealand citizenship before moving to Hastings. Mrs Pretorius, meanwhile, had "hung up her nursing shoes" 10 years earlier after marrying and starting a family.
"That was the lifestyle in Rhodesia. The men worked, the women stayed at home, had children and managed the household. It was a home life with tea parties and socialising. Here I have to work for the rest of my life," she laughs.
She completed a course to update her nursing competencies and prepare her for New Zealand nursing practice. After nursing at Royston Hospital for four years, she has worked the last seven years in Hawke's Bay Hospital's emergency department.
Studying for her master's started almost accidentally, with a postgraduate paper on advanced clinical assessment and diagnostic reasoning.
"Funding was available, other nurses were studying, and the paper focused on what I was doing every day as an ED nurse."
Mrs Pretorius progressed to a course every year, which led to her achieving the EIT Postgraduate Diploma in Health Science. Then a nursing colleague in ED persuaded her to join her in studying for the master's degree.
"It was just another couple of papers, she said, we are nearly there."
She says studying at EIT has "absolutely" helped in her job.
"Like many, I looked askance at people who took on further study. But I really got into it. You only then realise there's so much more to know and how that can improve your nursing and broaden your thinking.
"Previously, I might have asked why I should have to change. I know now that you have to constantly improve your knowledge and keep up to date to ensure best practice at all times. That knowledge enhances everything you do, making you a better person and a better nurse."
Spending the best part of a year on master's research, Mrs Pretorius rates EIT's library staff highly.
"You've got to make sure your referencing is correct and they are masters at that. If I lost any typed work on the day, they would fiddle and retrieve it. They were fantastic, absolutely brilliant."
As an enthusiastic upskiller, she is a now a candidate for Nurse Practitioner and she is also involved in an EIT research project on skin cancer screening. Her daughter Mareli, a second-year Bachelor of Nursing student at EIT, will be joining her husband and son in celebrating Mrs Pretorius's graduation.