He was recruited to join the NEDA right after graduation, and after finishing his training at the UPSE, he volunteered for an assignment serving in the Eastern Visayas Regional Development Council from 1974 to 1976.
Beginning as a research assistant, Sobrepeña became a director in the national government at the age of 27, steering the Policy Coordination Staff of NEDA.
His responsibilities in the NEDA included managing the review of proposed economic policies and the formulation of regional and physical development plans.
The MBFI has emerged as one of the country's most dynamic philanthropic organizations, implementing a wide array of CSR programs in such key sectors as education, visual arts, health care, the judiciary, police and military, and grant-making to various socio-civic and charitable institutions in the Philippines and in the Asia-Pacific Region.
[7] His being the lone panelist from Asia to address the international gathering was regarded as a recognition of the successful programs of the Foundation and the leadership of the institution in corporate social responsibility[7] The De La Salle University conferred on the Foundation the Signum Ministerii[8](Sign of Service) Medal “in recognition of its various initiatives, programs and achievements toward the enhancement of the quality of life of and the promotion of a culture of excellence among Filipinos.” MBFI is the third recipient of the award aligning itself with venerable institutions that have vigorously figured in the attainment of our nation's democracy, namely, the Radio Veritas, the only Catholic radio station in Asia in 1983, and the National Citizens' Movement for Free Elections (NAMFREL) in 1984.
Chito had served as pastoral leader to single men and, together with his wife, and is currently involved in conducting marriage enrichment workshops, called Intimacy Weekend.