Chairman and President of the Rex Group of Companies;

President of the Asia Pacific Publishers Association (APPA);

Past President of the ASEAN Book Publishers Association (ABPA);

Philippine Representation to the IPA since 1995;

  •      IPA Copyright Committee Member;

President of the Forum for Asia Pacific Graphic Arts (FAPGA);

President of the Philippine Printing Technical Foundation (PPTF);

President Emeritus of the Philippine Educational Publishers Association (PEPA);

President of the Philippine Book Publishing Development Federation (Philbook);

Chairman and President of the Printing Industry Board Foundation, Inc (PIBFI);

President, Dominador D. Buhain Foundation, Incorporated;

  •    Book Museum Marikina;
  •    Rex Display Area in Tanza, Cavite;
  •    Banaue Heritage Hotel and Museum;

President, San Beda University Alumni Association (SBUAA);

Chairman, La Consolacion College Manila Board of Trustees;

Chairman, La Consolacion University Malolos Board of Trustees;

Chairman Emeritus, Unified La Consolacion – South Luzon;

Past President; Club Bulakeño

President, Asean Print;

Past Position:

  •       Former Chairman of the National Book Development Board of the Philippines from 1995 to 2001;