Janet Fox, the senior vice president of sourcing at performance apparel and footwear specialist Under Armour, is to leave the company later this month, it has been revealed.

Fox "has resigned from the company to pursue other interests," according to a Securities and Exchange Commission filing yesterday (14 August), with her resignation coming into effect on 24 August. 

Under Armour said the move means it is now evaluating "the organisational structure and management needs of this area."

In the meantime, chief supply chain officer Jim Hardy will take on Fox's responsibilities overseeing the firm's apparel sourcing operations. Hardy was named chief supply chain officer in April this year with responsibility for "strategically guiding Under Armour's rapidly growing supply chains locally and internationally."

Fox joined Under Armour in March 2011 after a 29-year career at department store retailer JC Penney.

Under Armour last month raised its full-year operating profit expectations after recording strong second quarter growth helped by the success of its footwear range. Net profit increased 7% to reach US$7m over the three months ended 30 June as revenue surged 30% to $369m.