As a refinery worker with a TWIC card, your daily responsibilities may include monitoring and operating machinery, performing routine equipment inspections, and ensuring compliance with safety protocols in secure areas of the facility. You might also be responsible for assisting with maintenance tasks, reporting any irregularities, and supporting scheduled shutdowns or start-ups. Collaboration with other technicians, engineers, and safety personnel is common, as teamwork is essential to maintaining efficient and safe refinery operations. Your TWIC card allows you to access secure zones, which may involve additional duties related to federally regulated areas.