Rahel was born in Beirut, Lebanon, she moved to Germany in 2006. Rahel completed her Bachelor of Fashion Design in London at "Istituto Marangoni" in 2012. After graduation, she worked as a fashion designer at "Zuhair Murad" in Beirut. She continued her education in Sustainability in Fashion at "Esmod Berlin" in 2013, where she obtained a master's degree in 2014. For her master's project; she wanted to find a solution for sustainable luxury. She focused on a luxury textile "sequins", which is completely made out of polyester. The aim was to develop the first biodegradable sequins textile by eliminating all hazardous chemicals. she partnered up with "Jakob Schlaepfer ", a luxury textile manufacturer in Switzerland, as a research partner with a textile sponsorship for the master’s collection and “BASF” a pharmaceutical company. For this project and her final collection, she was awarded the “GUCCI” prize with a mentorship at the headquarters in Florence.
Rahel has participated at the Berlin Fashion week for a couple of years and has shown her collection at the Mercedes-Benz Fashion Week. In 2015 she participated with “Not Just a Label” in Fiera di Vicenza, exhibiting her collection and giving a lecture about her work. In 2016, her collection was presented at the Panasonic Manila Fashion Festival in the Philippines. From 2016 - 2017 she moved to Basel, Switzerland to join the design team at “Tally Weijl." In 2017 She was invited to be part of the Volkswagen Fashion Show in Berlin.
In 2018 she officially founded her brand “RAHEL GUIRAGOSSIAN” in Switzerland.
As a sustainable designer, Rahel works with her heritage. She comes from a family of painters and uses the paintings of her grandfather, father and brother. She brings decades of art knowledge into her designs. A very important aspect of the brand is the slow fashion approach, where quality replaces quantity. The fabrics come from the highest quality producers in Italy and Switzerland. A painting is timeless and can never go out of style creating longevity and long lasting designs. She also uses the “zero waste” method by trying not to waste any fabric and sometimes the fabric is not even cut but is instead draped around the body like a sculpture. This method also keeps the entire painting intact without creating any waste.
In March 2019, Rahel was invited to be part of the “Mercedes-Benz Fashion Week Russia” where she presented her first solo fashion show with her latest collection in Moscow.