Pittsburgh — Leading fashion destination rue21 welcomes Karlyn Mattson as the new executive vice president, chief customer officer. She has over 25 years of experience at global retailers including Target, Amazon, Macy’s and, most recently, GNC. At rue21, Mattson will help bolster the brand’s ethos, bringing a personalized approach to understanding, meeting and exceeding shoppers’ needs. “Karlyn’s industry leadership and dedication to customer needs is perfectly aligned with our mission at rue21,” says Josh Burris, president and CEO of rue21. “Her unique background will be invaluable as we continue to …