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About Us

Qualified top 100 firm with a focus on relationships

Founded in 1971 as Joseph Decosimo and Company, Decosimo is a leading public accounting and business advisory firm with offices in Chattanooga, Knoxville, Memphis and Nashville, Tennessee; Atlanta and Dalton, Georgia; Huntsville, Alabama; Cincinnati, Ohio; and the Cayman Islands. Decosimo is ranked among the Top 100 CPA firms in the U.S. with approximately 300 professionals and support staff. 

Decosimo is the CPA firm of choice for hundreds of businesses and not-for-profits who require the highest level of service at competitive rates. Decosimo enjoys recognition by some of the nation's largest and most trusted lenders and financial institutions. These relationships are key to our clients as they expand their businesses and plan for future growth.

After 40 years, we remain the best alternative to the Big Four firms–and other national accounting firms–providing quality work, reliable advice and technical support through our principals and professional staff who are experts in their respective sectors of the accounting industry. 

The cornerstone of our client relationships is access–access to capable professionals and to decision makers. Decosimo’s regional practice network places professionals in close proximity to you to ensure timely and responsive service. Moreover, principals with the authority to make decisions regarding your account are available to you at any time. This type of client commitment means faster response time to the problems you are facing and more direct involvement in the success of your organization.

Relevant experience serving diverse industries

Decosimo serves clients from virtually every industry including investment partnerships, financial services, hospitality, manufacturing, healthcare, government and not-for-profit, construction and real estate, as well as entertainment and professional sports franchises. Many of our clients are nationally and internationally recognized, including Life Care Centers of America, McKee Foods Corporation, St. Louis Cardinals, Olan Mills, Beaulieu of America, and Miller Industries. 

Since inception, Decosimo’s focus has been on delivering quality audit and tax solutions. As our clients have grown, so has the demand for expanded services to meet their complex needs. We answer that demand by offering our expertise in the areas of business valuation, merger and acquisition consulting, due diligence, litigation support and forensic accounting services. We also provide expanded tax services to address such issues as estate and gift tax, uncertain tax positions, multi-state issues, pass-through entity relationships, expatriate and international tax issues. 

Our breadth of services and depth of relevant experience serving these and other industries, as well as our commitment to continued technical training and advanced certification, sets us apart from other regional firms. Read testimonials from our happy clients.

Resources comparable to Big Four firms

Decosimo serves each of its clients using a team of personnel from across our firm’s regional practice network who are best suited to meet the complex needs of our clients. 

Beyond our significant regional presence, we have access to the extensive resources and professionals of Moore Stephens International Limited, an association comprised of 299 independent CPA firms with 624 office locations across 101 countries. Occasionally, we will call on the expertise of professionals within another Moore Stephens firm. Through our association with Moore Stephens, the breadth and depth of services available to our clients are equivalent to those offered by Big Four firms; but services are enhanced by a more hands-on, personalized approach to serving client needs. In each and every case, Decosimo's lead principal remains involved in overseeing the engagement, making sure deadlines are met and ensuring that our clients receive the best available service.

Commitment to quality control and professional excellence

We devote significant resources to training staff, reviewing performance and ensuring that adequate quality controls are in place so that work performed by the firm meets professional standards.

As a Decosimo client, you benefit from a disciplined approach to audit and assurance services. Decosimo has completed its 12th consecutive triennial peer review as part of the Peer Review Program with the American Institute of Certified Public Accountants (AICPA), receiving the highest level of independent assurance on our system of quality control concerning the assurance services provided to our clients. Request a copy of our AICPA Peer Review report.

Additionally, Decosimo is a member of the AICPA Center for Audit Quality, the AICPA Employee Benefit Plan Audit Quality Center and the AICPA Governmental Audit Quality Center. Decosimo is also registered with the Public Company Accounting Oversight Board (PCAOB). As a registered public accounting firm, we are subject to triennial inspections by the PCAOB to assess our compliance with professional standards and regulatory requirements. Request a copy of our PCAOB report.

Many of our professionals maintain advanced credentials in specialized disciplines to better serve our clients. Credentials include: Certified Fraud Examiner, Certified in Financial Forensics, Certified in International Financial Reporting Standards (IFRS), Accredited Estate Planner, Accredited Senior Appraiser, Accredited in Business Valuation, Certified Management Accountant, Business Valuator Accredited for Litigation, Certified Business Appraiser, Certified Information Technology Professional and Retirement Plan Associate.




Decosimo is an independent member firm of Moore Stephens North America, which is itself a regional member of Moore Stephens International Limited (MSIL). All the firms in MSIL are independent entities, owned and managed in each location. Their membership in, or association with, Moore Stephens International Limited should not be construed as constituting or implying any partnership between them.