━ Our story

Optimum Tax and Accounting Consultants was founded by Oliver Vaidis and Keith Simpson. Oliver and Keith initially met whilst both attending the University of South Florida. Instantly, they realized they shared the same passion and values in helping others. Throughout their careers they kept in touch until the right moment presented itself to make their vision a reality and Optimum Tax was born. Today they put their vision to work by helping clients understand and navigate the intricacies of accounting and tax, enabling the clients to focus on the operations of their business.

━ Keith Simpson

Keith is one of Optimum’s founding members and has almost a decade of accounting experience. After earning his bachelor’s degree from the University of South Florida he joined one of Florida’s top regional accounting firms where he focused on providing top notch outsourced accounting services as well as advanced corporate and personal tax planning and preparation services. Keith then joined a private equity backed healthcare organization as corporate controller and played a pivotal role in scaling the organization to almost $100 million in annualized revenues. In his free time Keith enjoys playing golf and traveling.


━ Founder

━ Oliver Vaidis, CPA


━ Founder

Oliver graduated with honors from the University of South Florida with a dual degree in Accounting and Finance. Shortly thereafter he completed his CPA license, prompting him to enter the world of public accounting. During his time in public accounting, Oliver specialized in the role of outsourcing accounting work and taxes with a plethora of various sized clients. Aside from public accounting, Oliver has an abundance of experience in the corporate accounting world, specifically in private equity. He successfully oversaw the sale of a 20mm+ sized company as the head of finance. Furthermore, he has vast experience in executive level roles supervising 100mm+ worth of revenue in mergers and acquisitions. However, his true passion lies with helping small business clients navigate the complexities of accounting and taxes. In his free time, Oliver enjoys playing golf, traveling, and cooking different dishes with his wife.

━ supervisor

Seth Marks, CPA

Seth is a US Navy veteran and earned his Bachelor of Science in Accounting from the University of South Florida. Upon graduation Seth quickly gained hands-on experience providing a broad range of accounting and CFO services while earning his CPA license. His primary focus is outsourced CFO services, financial reporting and compliance, and tax preparation. Seth spends his free time lifting weights, biking on trails, and golfing.