Yaf has a Bachelor Degree in Business majoring in Accounting and Computing at Pacific Adventist University. He has a background in auditing, accounting and project management.
- 2014: Bachelor in Business, Pacific Adventist University, Papua New Guinea
- 2020-present: Finance Officer – Burnet Institute
- 2016-2019: Brite Construction – Founder/Manager
- 2015: Graduate Accountant – PriceWaterHouseCoopers PNG