“When we were in need of financing several years ago, Grassi & Co. helped position us to secure an excellent deal. Their knowledge of the construction business and their relationships with lenders was a strategic benefit to our working with them through the years. They've also been instrumental in helping us with our estate planning situation.”

John Dierks, Dierks Heating Co., Inc.

Grassi & Co., CPAs

Grassi & Co. CPAs Grassi Consulting Grassi Healthcare Consulting GCM Systems

Grassi & Co., CPAs, P.C. has been recognized as one of the nation's elite accounting firms. Ranked by Crain's New York Business as one of the 25 largest accounting firms in New York and by Long Island Business News as one of the top 10 on Long Island (#6), we are a full-service tax, accounting and business advisory firm. We are headquartered in Jericho (Long Island), with offices in Manhattan, North Carolina, and worldwide through Moore Stephens International Limited.

Respected throughout the industry, our team consists of 140 talented professionals, each with a diverse range of functional and industry experience. For more than a quarter century, we have helped clients improve their businesses and realize their potential. Our people are the key to our success, and we have been recognized nationally as one of the Best Accounting Firms to Work For by Accounting Today. However, no awards or accolades can surpass the value or importance of our clients' testimonials. The firm's motto, embodied by managing partner Lou Grassi, best sums up our philosophy: "We Work Hard and We Play Hard."