We are the Alpha Omega Chapter at Carthage College | Connect with us for updates on our events, accomplishments, and brotherhood bonding! Pi Sigma Epsilon, is the only national, professional fraternal organization in sales, marketing, and management open to everyone in the United States since 1952. PSE's mission is to develop its members' sales and marketing skills through lifelong opportunities. The organization's goal is to provide collegiate students with practical business experience through sales, sales projects, marketing, marketing research, and community service projects. Alpha Omega is among the 60+ chapters nationwide. In addition to the collegiate students, PSE offers opportunities to working professionals, alumni, and educators who work with and support the collegiate chapters.