Dennis Gasgonia furthered his studies at the University of San Tomas Espana, Manila, Philippines in Journalism between 1994 – 1999. Then from (1999 – 2003) he was attached with The Philippines Star newspaper as a freelance Cartoonist providing a running cartoon strip for the paper’s comic pages. In (2000-2004) during this period Gasgonia was working with three highly acclaimed newspaper companies The Manila Standard, The Daily Tribune and The Manila Times as a Correspondent covering and reporting several Police district beats including government departments in Manila and Quezon City.

Between 2004 – presently, his career brought him to Filipino’s largest entertainment and media conglomerate ABS-CBNNEWS.COM based in Quezon City where he began as Catalogue Writer overseeing organizational process of old newscast video for library purposes (2004). From 2005-2008 he was then promoted as News Writer wrote news articles for various sections of the website (sports, nation and regions). Then in 2008-presently, he became the Senior Sports Writer writing and editing sports articles for the company’s web page.

Presently, Gasgonia is an Editorial Cartoonist with the same company and goes by the pen name Dibujo S Gasgo.