About Us
Our Philosophy
Keratherapy is not just a brand, it’s an experience. Our passion for hair care is evident in our expanding collection of products, the salons at which they're carried, and the clients who swear by them. Our straight forward approach and commitment to the highest standards are unparalleled, allowing us to provide products backed by scientific research and educational support to our partners worldwide. Only the finest ingredients are selected to develop the most innovative formulas and guaranteed results. Infused with Keratherapy’s signature blend of pure keratin and silk amino acids, our collection of products contain natural antioxidants and organic Amazonian fruit extracts that penetrate the cuticle, repair and rejuvenate. The results: healthy, luxurious, contagious results.
Beauty infused with science and nature is not only our motto it’s our mission.
The Dióra Professionnel mission is one Mulhollen is proud of and stands by. ”We will always create products with the highest quality and effectiveness to achieve the absolute best results. The promise of transparency, honesty and the quality of our products is, and will always be our commitment to our customers." - David Mulhollen Jr., -President and Founder of Dióra Professionnel.
FOUNDER/PRESIDENT
David Mulhollen Jr.

Industry avant-garde, David Mulhollen Jr. is regarded as one of the most trusted and sought-after individuals in the professional beauty industry. Mulhollen is highly acclaimed for his ingenuity, passion and commitment to always strive for excellence. His 18 years’ experience coupled with his steadfast pledge to providing the highest quality products to clients worldwide is what culminated in the launch of Keratherapy, the leaders in professional hair smoothing innovation.
Mulhollen’s illustrious career began after graduating from Kent State University in Ohio. Mulhollen’s first position was as a Salon Sales Consultant for a distribution company, followed by management positions at some of the world’s largest professional hair care companies, including Wella Corporation and Sebastian International. He climbed the ranks from Sales Consultant, Sales Manager, to Vice President of Sales.
Throughout the years, Mulhollen experienced first-hand what stylists around the globe needed to be successful. He also learned specialized business practices and marketing techniques to support salons, stylists and distributors alike, to ensure their continued success. Quipped with this vast experience and industry knowledge, Mulhollen launched Keratherapy, thus filling the gap in the much-needed keratin category for a quality brand with integrity.
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