Tes has worked in the public accounting since 1994.
Tes received her Bachelor of Science in Accountancy degree from the University of Negros Occidental – Recoletos in 1994 and joined SGV & Co. (EY Philippines) in the same year. In October 2000, she joined PWC Singapore and E.C. Ortiz & Co. LLP in 2001.
Tes is a Certified Public Accountant in the State of Illinois and California, a Certified Internal Auditor, a Certified Information System Auditor, and a Chartered Global Management Accountant.
She is a member of the American Institute of Certified Public Accountants, Illinois CPA Society (ICPAS), Institute of Internal Auditors, Government Finance Officers Association (GFOA) and ISACA.
She serves as member of the ICPAS Governmental Report Review Committee and GFOA Special Review Committee.