Summary View Common Definitions of terms found in this announcement. Organizational Location: These positions are located in the Department of Homeland Security, U.S. Immigration and Customs Enforcement, Homeland Security Investigations at 242 duty locations throughout the country. These are non-bargaining unit positions. Responsibilities As a Criminal Investigator, at the full performance level, you will perform the following duties: Conduct and coordinate high-level comprehensive investigations involving individuals, groups, or large organizations operating at a local, national, or international level. Use electronic surveillance, interviews, polygraph examination, and physical surveillance to obtain evidence in investigative cases. Make arrests, confront multiple suspects, and secure scenes sometimes under potentially dangerous and hazardous environments. Take part in securing signed statements, affidavits, and documentary evidence for inclusion in reports or case records. Prepare s...