Born and raised in Phoenix, Arizona, Whitney graduated from The University of Texas in Austin with a degree in theatre, concentrating in costume design. After a final semester at the Sorbonne, she moved to New York in 2003. Whitney began her career at Kate Spade New York, while honing her skills at Parsons and the Fashion Institute of Technology. At Kate Spade, Whitney's responsibilities grew from designing cold weather accessories to playing an integral role in the re-launch of apparel. Pozgay also oversaw Kate Spade’s collaboration with the avant garde collective Three Asfour.
In 2007, Whitney became lead women's wear designer at Steven Alan where she also spearheaded and designed women’s collaborations including Steven Alan for Uniqlo and Urban Outfitters’ brand Lark and Wolff. She left Steven Alan in 2009 to realize her long time dream of venturing out on her own. She launched WHIT for the fall 2010 season with partners Zonda Sochorow, Zach Cooper and Parker Argote.