Nationally recognized Microsoft Excel expert David H. Ringstrom, CPA, is the president and owner of Accounting Advisors, Inc. based in Atlanta, Georgia. David founded Accounting Advisors in 1991 as a consulting-services business, later he began teaching continuing education classes as well. His mission since is to offer quality training and consulting services on Microsoft Excel via live webcasts, on-demand self-study webcasts, and in-house engagements. David has taught hundreds of webinars on Excel and other topics, in addition to speaking at conferences and in-house engagements.