An OTDR (Optical Time-Domain Reflectometer) job typically involves testing, troubleshooting, and maintaining fiber optic networks. Professionals in this role use OTDR devices to analyze fiber optic cables, detect faults, measure signal loss, and ensure network efficiency. They work in telecommunications, internet service providers, and other industries requiring fiber optic infrastructure. Tasks may include generating reports, interpreting test results, and coordinating repairs. Strong technical skills and experience with fiber optics are essential for this role.