Tahari will continue to own and manage the Elie Tahari collection.
The HSN jeans guru will introduce a new model on Thursday on the cable network.
Most recently, Williamson was senior vice president of global sales at Splendid and Ella Moss.
Project Gravitas, in sizes 0-24, is being carried at Lord & Taylor’s Fifth Avenue and Washington, D.C., stores and at lordandtaylor.com.
The two-level unit is located on 47th Street.
Rousso started Russ Togs with his brother, Eli, in 1946.
The premium corduroy brand is putting a new spin on two of Alpha Industries’ military silhouettes.
The six-piece capsule features fashion-forward patterns and silhouettes to be worn both on the mountain and in the lodge.