About Us

We've grown our business by helping our clients grow theirs. DaltonMcCormick LLC has supported the accounting, tax, and financial management concerns of Jacksonville area businesses, offering a full range of general CPA services.

We fully understand the difficulties (and the joys) of running a business and take deep satisfaction in helping local business owners keep their financial houses in order, save money, avoid mistakes, and free up more time to focus on managing their businesses, and less time on their books.

We are honored by the trust and confidence our clients place in our advice and oversight. We continue to deserve your trust by staying abreast of accounting and tax law changes and by taking a proactive interest in the smooth financial management of your business. Every DaltonMcCormick LLC client knows to expect quality service in complete compliance with the standards established by the American Institute of Certified Public Accountants.

Mark Sizemore, MAcc, CPA Mark Sizemore is a Florida certified public accountant since 1994. He has over 20 years experience working with public, private, and non-profit organizations in addition to owning several small businesses. His experiences have shaped his desire to help businesses solve problems. Seeing the big picture and developing appropriate strategies are important to Mark and will help you achieve your desired results. Mark holds two bachelors' degrees one from the University of Florida (BS Telecommunication) and one from the University of North Florida (BBA Accounting). He also holds a Masters of Accountancy from the University of North Florida with a concentration in Taxation. Early in Mark's career, he was drawn to teaching. As an Adjunct Professor for St. Leo University, Mark has taught all levels of accounting classes. This experience has taught Mark how to communicate and convey complex information in easily understood formats.

Mark is a member of the American Institute of Certified Public Accountants (AICPA). In addition to being a Florida CPA, Mark is a Florida Licensed Real Estate Broker and member of the National Association of Realtors, the Florida Association of Realtors, and Northeast Florida Association of Realtors. He also is a Florida Licensed Mortgage Broker. Mark has many outside interests that focus on giving back to the community that he lives and works in. He is active with the United Way of Northeast Florida working on their Resource Allocation Committee. He is President of the Board for the Sanctuary on 8th Street, an organization that focuses on providing afterschool and summer camp programs to children in the intercity of Jacksonville, Florida. Additionally, he is the Secretary and Treasurer of Living Water 4 Roatan, Inc., a non-profit missions organization that provides humanitarian care for individuals living in Roatan, Honduras.