Trusted, Experienced Tax and Accounting Services


About Us

Mahmood Mumtaz, founder and owner of MZM CPA, is a Certified Public Accountant with over four decades of experience in tax compliance, tax accounting, financial accounting, and tax planning and over three decades of experience working within the oil and gas industry. He offers tax, accounting, audit and management consulting services to businesses and individuals.

Mr. Mumtaz began his career at Deloitte, one of the big four accounting firms, and worked on the audits and prepared tax returns of Deloitte’s various clients in the manufacturing, banking, retail, and not-for-profit sectors. He then moved over to Marathon Oil Company where he worked in many different roles both nationally and internationally as a Tax Specialist and a Host Country Tax Coordinating Manager. In these roles, Mahmood was responsible for reviewing annual U.S. consolidated tax returns for Marathon Oil Company and for Marathon Petroleum Company LLP. He evaluated internal controls and tax risks, managed foreign tax compliance, worked on complex FAS 109 issues, and successfully set up monthly tax filing and payment procedures for Marathon’s re-entry into Libya with tax payments amounting to over a billion U.S. dollars annually.

After working for Marathon Oil Company for over thirty years, Mr. Mumtaz moved to Hess Corporation as the Manager of International Tax Accounting and Compliance. In his role at Hess, he managed tax compliance function for various non-U.S. tax jurisdictions, managed the preparation of local country statutory tax accounts and disclosures, reviewed the realizability of deferred tax assets, as well as analyzed the feasibility of using the effective tax rate method for monthly U.S. and foreign tax provisions.

Mahmood Mumtaz has a practicing CPA license in both Texas and Ohio and has recently completed over 200 hours of continuing professional education. He has expertise in SAP and Corptax and holds an M.A. from Ball State University and an M.B.A. from University of Karachi in Pakistan.

Mr. Mumtaz lives in Houston, Texas and offices in the Galleria area. He also serves as a Director on the Board of Houston Metropolitan Chamber of Commerce.