Provide high-quality data labeling and annotation services for machine learning projects. Specialize in computer vision annotations, NLP dataset creation, audio transcription, and multi-modal data preparation. Manage teams of annotators and ensure data quality standards. Income: $2,000-10,000/month. Skills: Understanding of ML requirements, quality assurance, project management, domain expertise in specific verticals. Tools: Labelbox, Scale AI, Prodigy, CVAT, annotation software, quality control systems. Target: AI startups, research organizations, enterprise AI teams, autonomous vehicle companies. Difficulty: Beginner to Intermediate - scalable through team building and specialization.