Professional Legal Tax Experience is defined as providing legal guidance and analysis related to Internal Revenue tax laws, regulations, and decisions applicable to one or more of the following areas: Tax matters concerning all phases of energy production (to include extraction or harvesting of natural resources), Energy-related production tax credits and investment tax credits, Other tax issues ancillary to energy production (such as normalization), The research credit under § 41, The energy industry, including related federal government agency experience, Tax litigation. The Senior Technician Reviewer (STR) serves as a technical expert for the Associate Chief Counsel, Energy Credits and Excise Tax (ECE) responsible for one or more of the specialty areas of tax law under ECE's jurisdiction, including tax matters involving natural and renewable energy resources, business and energy-related tax credits and incentives, and excise taxes.