[1][2] His research focuses on climate change and extreme weather events in the Indo-Pacific region, with significant contributions to the understanding of Indian Ocean warming, monsoon dynamics, heatwaves, and tropical cyclones.

[10] Since 2010, he has worked as a scientist at IITM, Pune, involved in projects related to ocean observations, climate modeling and earth system research.

[16][17] His work has shown that the expansion of the Indo-Pacific Warm Pool is altering global rainfall patterns by modulating the Madden–Julian oscillation, which impacts weather systems across the tropics and beyond.

In 2016 his research on the impact of climate change on the monsoon earned him the Indian Meteorological Society's Young Scientist Award.

[24][34] This initiative aims to enhance disaster preparedness while fostering climate awareness among students and communities, contributing to local resilience in the face of extreme weather events.

[3][34][35] Koll was honored as a "Change Maker" at the Manorama News Conclave 2024, recognizing his impact on climate resilience and community engagement in Kerala.