Sumit Jain has over 1.5 years of experience in data warehousing using ETL tool DataStage. He has worked on projects involving extracting, transforming, and loading data into Oracle and Teradata databases. His most recent project was for Vodafone Essar Limited, where he helped design and develop an Oracle 11g data warehouse using DataStage. In this role, he participated in requirements gathering, monitored daily loads, performed testing and tuning, and resolved issues. He has strong skills in DataStage, Oracle, UNIX, and has experience in scheduling, monitoring, and ticketing tools.