Credit Union Rock Stars are typically known for their selflessness and dedication to others. Sheri Szemplinski and Arnessa Belin are no exceptions.  Sheri Szemplinski, operations administrator for the business operations team in commercial banking at $2.3 billion asset CAP COM Federal Credit Union in Albany, N.Y., has committed her legacy to volunteer work, both at the credit union and in her personal life.  Arnessa Belin, call center supervisor at $28 billion asset BECU in Tukwila, Wash., has found that a career in cooperative financial services allows her to express herself while creating change within her workplace and community.  They’re among 31 credit union leaders named as 2021 Credit Union Rock Stars by Credit Union Magazine. Sponsored by Fiserv, the Credit Union Rock Stars program recognizes outstanding credit union professionals and volunteers from a wide range of disciplines for their exceptional creativity, innovation, and passion.