About our firm
Cornelius, Leone & Campbell has served Jacksonville and beyond since the firm was founded. Get to know the people behind the work.
Meet our team
Managing Partner
Sonja Campbell, CPA
Sonja came to Jacksonville from Serbia in 2009 and put herself through the University of North Florida, earning her BBA in Accounting in 2014. She joined the firm directly after graduation and has since become a central part of the practice.
After passing the CPA exam, Sonja went on to earn a Master's in Management Information Systems from Florida State University. She prepares taxes in four languages and works with clients across the globe.
Her specialty is IRS representation: when a notice arrives, clients hand it to Sonja and let her handle it. She is active in the Florida Institute of Certified Public Accountants.
Retired Partner
John R. "Jack" Leone, CPA
Jack has over 34 years of experience in accounting, 29 of those years in private practice. His areas of focus include automobile dealers, contractors, restaurants and franchises, and homeowners associations, as well as personal and business tax and accounting matters.
A native of Boston, Jack has called Jacksonville home since 1985. He is actively involved in the community through St. Joseph's Catholic Church and the Harvey Bernhardt Foundation, and is a member of the American Institute of Certified Public Accountants and the Florida Institute of Certified Public Accountants.
Jack received his BBA in Accounting from the University of Maine, where he was a four-year starter on the football team and still holds the record as the school's all-time leading scorer. He is a licensed CPA in both Florida and Maine.
Co-Founder
Ben Cornelius, CPA
Ben co-founded the firm in 1979 and spent 30 years in public accounting before stepping back from full-time practice in 2007. His areas of expertise included trusts, estate planning, and personal income and business tax planning.
He holds a BA in Business Administration from Belmont Abbey College and remains a licensed CPA in the state of Florida. Ben continues to be available as needed.
Professional memberships
Our professional affiliations
AICPA
We are enrolled in the AICPA Private Companies Practice Section and subject to triennial peer review — our last review confirmed we met all established standards.
FICPA
Member of one of the largest CPA associations in the United States, founded in 1905.