Large enough? Small enough? Just right. We are large enough to provide a comprehensive range of services for any need--from the smallest individual tax planning project to the largest corporate client engagement. Our flexible approach is designed to meet the diverse needs of each one of our clients. Our technical expertise allows us to specialize in personal, hands-on and customized service to our clients. No matter how large or small your business, KN+S is the right size for you.

At KN+S, our team works closely with each client to develop a full understanding of your goals and objectives on which a strong working relationship depends. We immerse ourselves in your systems and processes to gain an understanding of the dynamics of your business, to help manage complexity and support the growth of your business. We regard our staff as teammates for your organization - embracing your business objectives and taking pride in accomplishments we achieve together. As a member of your team, you can rely on us to be a trusted advisor, an honest colleague and a reliable, effective ally.

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Jeffrey Solomon Kns

A Message from Jeffrey D. Solomon, Managing Partner

One of Boston’s premier regional firms, Katz, Nannis + Solomon works with entrepreneurial business and their owners to accomplish their goals.

With a history of over 30 years, proactive and creative planning is delivered with a focus on client service. A large piece of our business is tech focused, angel and venture backed clients. Whether it’s an audit, a complicated individual or corporate return, or just tax planning, feel free to contact us or visit our website.

Contact Us

Katz Nannis + Solomon PC

800 South Street, Suite 250, Waltham, MA 02453

+1 781 453 8700

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Firm Locations

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Primary Location

800 South Street, Suite 250, Waltham, MA 02453, United States

Jeffrey D. Solomon, Managing Partner
+1 781 453 8700

People at Katz Nannis + Solomon PC

Jeff Solomon Photo

Jeff Solomon

Managing Shareholder

Sebastian (Sam) Malatos Photo

Sebastian (Sam) Malatos


Sandy Caterine Photo

Sandy Caterine

Tax Partner

Bryan McKeon Photo

Bryan McKeon


Mark H. Misselbeck Photo

Mark H. Misselbeck

Tax Principal

Dawn Darnell Photo

Dawn Darnell


Alan Muster Photo

Alan Muster

Tax Partner

Gary Weinman Photo

Gary Weinman

Tax Partner