Campbell, Jones, Cohen CPAs focuses on you or your business where it counts. The bottom line. In 2013, Campbell, Jones & Co., CPAs, Ltd. merged with Jack Cohen CPA, LLC to offer a broader spectrum of tax and accounting services that make sense for individuals and businesses. Based in Las Vegas, Nevada, the strength of both certified public accounting firms provides clients with a solid team of CPAs, Enrolled Agents, and bookkeeping experts to provide comprehensive services that are the keys to financial stability for any individual’s financial livelihood or company’s operational success.