SLAG FOR SLEUTHS is a term used to describe the job of a Technical Surveillance Countermeasures (TECS) specialist. TECS is an acronym for a four-letter job title that involves using specialized equipment to detect and counter surveillance activities. This job requires a high level of technical expertise and knowledge of the latest surveillance technologies. The term SLAG FOR SLEUTHS is used to describe the job of a TECS specialist as they are responsible for detecting and countering any attempts to eavesdrop or spy on their clients.