Eldrin is the curator of the microalgae collection of the Philippines National Collection of Microorganisms. His research focuses on diatom-microbe interaction with emphasis on describing the mechanisms of bloom formation of an invasive diatom species (Cymbella janischii) using metabarcoding and metatranscriptomics.  As a curator, he also does research on the isolation, long-term preservation, identification, molecular taxonomy and biotechnological applications of different terrestrial, aquatic, and marine microalgae (particularly diatom species).