Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) invites online applications for 108 apprenticeship positions for Engineering Graduates and Diploma holders. The vacancies include 76 Graduate Apprentices and 32 Technician Diploma Apprentices. Eligible Tamil Nadu candidates who completed their qualifications in 2022, 2023, 2024, 2025, or May 2026 may apply through the NATS portal.