Throughout her extensive career, Petru has contributed her expertise in various regions, including  South Africa, Australia, New Zealand, the United Kingdom, Scandinavia, the UAE, Russia, South America, the USA, and different parts of Europe. During this time, she has been actively engaged in researching the latest advancements in skin biology and cosmetic chemistry. This deep involvement has nurtured her passionate commitment to the development of advanced skin resurfacing treatments. 

Today, based in Barcelona and South Africa, Petru serves as the Founder and Creative Director of pHformula. Her deep interest in the remarkable progress and advancements within the field of dermatological skin resurfacing has led her to collect a wealth of experience and knowledge. Petru has had the privilege of working closely with numerous internationally renowned master opinion leaders, many of whom are distinguished scientists, dermatologists, plastic surgeons, and aesthetic surgeons.