You Are Now Certified Congratulations! Completing and passing our case study allows you to join the ranks of certified weft installers, with a certificate sent right to your door. Start off as an accredited stylist, then work towards higher levels of certification - possibly even becoming one of our most revered professionals in no time at all. Levels Of Certification The levels of certification were implemented as a reward and referral system, you are automatically upgraded to Junior and Senior Installer based on a certain amount of orders and installations you complete as well as active social media interaction with Onlypro. To become a master installer you have to attend our masters training and successfully complete the masters challenge.