Welcome to Musselman & Creager, LLP Musselman & Creager, LLP is a full service accounting firm offering accounting and tax services to the business community since 1980, with offices in Gettysburg and Waynesboro, Pennsylvania. We hope that you find our website both informative and useful. Be sure to add our website to your favorites and please do not hesitate to pass our website onto your family and friends so that they may benefit from the resources and financial tools our website offers.