About Bethpage Federal Credit Union Bethpage Federal Credit Union has been serving its members and their communities for 80 years. Just like when we first opened our doors for Grumman employees in 1941, we’re keeping our promise to continuously meet the changing needs of our members with personal service and value. Our mission is to continuously meet the needs of our members, employees, and the communities we serve by being a trusted financial partner committed to excellence. Our History of becoming the largest Credit Union of the Northeast begins in 2003 with a unanimously approved community charter application to serve all Long Islanders.