Atty. Ruth B. Castelo was admitted to the Philippine Bar in 1994 and has since been continuously engaged in the practice of the legal profession. Her experience as a lawyer extends to government practice when she served as a City Attorney from 1994 to 2001, and where her litigation skills were honed. In this line of work, she was exposed to construction and government infrastructure projects reviewing construction contracts and ensuring proper implementation of the same.

In the course of her private practice, Atty. Castelo had argued before all court levels in the country, from the Metropolitan Trial Court, Regional Trial Court, the Sandiganbayan in a Division, the Court of Appeals in a Division, and the Supreme Court en banc, with the exclusion of the Court of Tax Appeals. The cases that she handled range from civil, criminal and administrative cases, among which are medical malpractice, violation of RA 3019 (The Anti-Graft Law), violation of PD 1096 (The National Building Code), construction disputes, and the like. She was engaged as a consultant for the Department of Public Works and Highways and the Metropolitan Manila Development Authority, particularly on construction and government infrastructure projects.

Prior to her appointment as DTI Undersecretary, she was admitted as Construction Arbitrator for the Construction Industry Arbitration Commission (CIAC) by virtue of her extensive exposure to construction contracts and litigation/arbitration of construction disputes.

Paulo is the co-founder and CEO of Zalora Philippines, the leading top fashion e-commerce platform in the Philippines, which accounts for up to 10% of net sales in this category or over US$ 40 million. Zalora is also among the top three (3) e-commerce platforms in the country in terms of site visits and monthly active users.

Prior to Zalora, he was a management consultant in Boston Consulting Group in Singapore where he worked with different companies in the region on business and organizational development, investor communications and strategy. He holds an MBC from Harvard Business School and graduated Magna Cum Laude from Princeton University with a degree in Public and International Affairs.