Sisterson's professionals have worked in the oil & gas ndustry for decades. This experience covers work for operators and investors in exploration and production, processing and other mid-stream ventures in most geographic areas of the United States where there has been significant on-shore E&P activities. Our experience includes auditing, accounting and tax services as well as a variety of other assurance and consulting services involving areas such as valuations, acquisitions and divestitures, joint ventures, joint interest billing audits, royalty audits, payout audits, operator transitions, litigation and forensic accounting and other matters. We are familiar with accounting for conveyances, leaseholds, cost sharing arrangements, drilling and development costs, asset retirement obligations, revenue recognition, lease operating costs, impairment, hedging arrangements, joint interest billings and reserve determinations.