The Modulator role involves attending and reporting findings from tests conducted in the Manzanillo laboratory, including assembling and disassembling test components. The position also requires validating quality points for changes and analyzing potential engine failures. Daily responsibilities include completing equipment checklists, notifying supervisors of anomalies, modulating parts to specifications, performing daily poka-yoke reviews, contributing improvement ideas, maintaining a 5S workspace, and adhering to standards while handling hazardous materials and chemicals.