The phrase "asleep at the switch" refers to someone who is not paying attention or neglecting their responsibilities. Antonyms for this phrase include "vigilant," "attentive," and "responsible." These words represent individuals who are aware and alert, taking their duties seriously and responding appropriately when needed. Another antonym for this phrase could be "alert," conveying the idea of someone who is aware of their surroundings and actively engaged in their job. Using these alternative phrases can help to communicate a sense of professionalism and dedication, highlighting the importance of staying focused and aware in any situation.