He has collaborated with other major brands such as Van Cleef & Arpels, Aqua di Parma, Bulgari, Sisley, Cartier, Frédéric Malle, The Different Company, or Le Couvent - Maison de Parfum.
Beginning with menial jobs, he became an apprentice at the factory of the essential oils maker Antoine Chiris in Grasse at the age 16 working on the night shift.
The story behind the creation of this fragrance was the subject of the book The Perfect Scent: A Year in the Perfume Industry in Paris and New York by Chandler Burr.
In 2018 Ellena worked with the House of Houbigant, to recreate Essence Rare, a fragrance he had first signed in 1973, his first assignment as a young perfumer in New York.
[7] Ellena returned to creating for Editions de Parfum Frederic Malle, his latest work, "Rose & Cuir," debuting in September 2019.
he created for and with Le Couvent a contemporary Haute Parfumerie rich and unique, luxurious and accessible, made from of noble and rare natural materials, 100% vegan: « Creating a Singular Haute Parfumerie accessible to all, working with beautiful materials and noble essences, is what seduced me at the Couvent.