TEG Federal Credit Union has been open since 1969. It's the 23rd largest credit union in New York with assets totaling $303.84 Million and providing banking services to more than 35,000 members. Membership: The credit union is a community-based financial institution. People living, working, or worshipping in the credit union's geographic area can become a member and access banking services. Membership is also open to immediate family of current members.