The ETSI Team
ETSI is composed of highly-dedicated professionals with vast experience in the Telecommunications and Engineering Industries. The Team ensures that the mission and values of ETSI are attained and upheld for the benefit of our key stakeholders.
Over 250 years of collective expertise in the fields of Sales & Marketing, Project Execution, Engineering & Operations, Finance & Corporate Management and Legal & Compliance; as well as approximately 90 years of combined loyal tenure within the ETSI-Siemens-Nokia Group of Companies.
Atty. Villonco is a Chairman and general partner of the prestigious Siguion Reyna, Montecillo, & Ongsiako Law Firm. Fields of practice: Labor law, corporate law, and civil/corporate litigation.
Recognized as Asia Business Law Journal’s Top 100 A-lister lawyers in the Philippines, he successfully steered many of the biggest companies in the Philippines - such as PLDT, San Miguel Corporation, Philippine Airlines, MERALCO, ATLAS Consolidated Mining Corporation - in negotiating and concluding Collective Bargaining Agreements, and productively resolving contentious labor issues.
Former member of the Integrated Bar of the Philippines’ Board of Directors and Corporate Secretary of Chapters Pasig, Makati, and Mandaluyong from 1983-1985.
Atty. Rolando Mario G. Villonco
Chairman of the Board
Cesar Jacinto V. Castro II
President & CEO
