Mark Walker is ProSphere’s Controller and Treasurer. He has been with ProSphere since 2014 and previously was Chief Financial Officer of AISG, Inc. for 9 years. Mark is responsible for the Accounting Department as a whole and reports directly to the Chairman of the Board. Mark works closely with executive management for financial statements, contract margins, month-end and year-end close, corporate taxes, budgets, and analysis. He has been involved with accounting in government contracting since 2003 and has previously worked with multiple agencies within the Federal Government. Mark has a Bachelor of Business Administration from University of Texas at San Antonio.