Ellen Goulmy started her career in photography and journalism before falling in love with lighting design. She founded her own lighting store called Poncius in 2008, which became a successful lighting design studio focused less on sales. In 2012, she closed Poncius and joined Berlux lichtarchitectuur as a lighting designer. Her projects at Berlux include interior, exterior, and daylight design for clients worldwide such as the Museum Park Rotterdam. Additionally, she teaches lighting design courses through the Lighting Design Academy.