Effective disposal of different types of waste has become important to maintain healthy environment. Vermicomposting has become an appropriate alternative for the safe, hygienic and cost effective disposal of organic solid wastes. Earthworms decompose organic waste leading to the production of compost which is high in nutrient content. The present work has been designed to reveal competitive and / or beneficial interactions by studying the inter-specific interactions in terms of growth, maturation, survival and vermicomposting efficiency of two earthworm species Drawida modesta (indigenous) and Eudrilus eugeniae (exotic) exposed to leaf litter waste of Pongamia pinnata. The investigation includes setting up of experiments to study the earthworm numbers and biomass and their impact on physico-chemical characteristics of vermicompost. Leaf litter waste decomposition by E. eugeniae and D. modestaon day 40 produced vermicompost that had an increased level of nutrients like total nitrogen, available phosphorous and available potassium and decreased level of pH, organic carbon and C:N (Carbon: Nitrogen) ratio. When compared to E. eugeniae, the local species D. modesta showed higher number of juveniles, non-clitellates and clitellates perhaps better adapted to local conditions. It is also quite apparent that D. modesta is the dominant species of the two worms studied. Since it is an indigenous species and can be easily located and reared for organic solid waste management, it is unnecessary to import invasive exotic species which may cause undesirable changes to the local biodiversity. D. modesta is a suitable species for decomposition of any type of organic solid waste.