Fraud Specialist. Why Work for Mainstreet Credit Union. Because Mainstreet Credit Union has consistently provided stability for employees and members over the span of more than 65 years. Not to mention, Mainstreet Credit Union aims to be the financial home to every member. We continue to strive for a welcoming culture, where our employees are knowledgeable, helpful, and accountable for their position within the team. To achieve this vision, we pr...