Professor Comstock is currently the Manager of Tax Policy for the American Petroleum Institute.  His responsibilities cover technical tax issues impacting the industry arising from federal and state income and excise taxes.  In addition, he coordinates advocacy efforts for tax issues on behalf of API.  Prior to joining API, Professor Comstock was a tax attorney with ExxonMobil in their Tax Department and provided planning advice for various projects in their Upstream, Downstream and Chemical operations.  He is currently Vice-Chair of the Energy and Environmental Taxes Committee of the American Bar Association’s Tax Section.