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Accountants & Auditors Technology Sales & Services Marketing


Since its inception in 1989, Eccezion, formerly Eder, Casella & Co., has been serving the Chicagoland communities. We are a full-service CPA, business consulting, technology, and marketing services firm that focuses first on our relationship with our clients by understanding their needs and helping them to achieve their personal and professional goals. Each Partner has put every effort into creating an environment where they are accessible - so our clients and employees feel valued, never like a number. As a premier CPA-led business advisory firm, we have a clear purpose: to help clients and team members achieve success, whatever that means to each of them. We have an exceptional team of talented and passionate professionals working together in a unique, high-performance culture. That culture is best defined by the 6 Core Values: Honest Reliable & Friendly, World Class Service, Effective Communication, Accurate & Efficient Solutions, Fun, and Success Mindset.


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