Emmett O' Brien Technical High School, or O' Brien Tech, is a technical high school located in Ansonia, Connecticut. It is in the Connecticut Technical High School System. O' Brien Tech receives students from many nearby towns.TechnologiesIn addition to a complete academic program leading to a high school diploma, students attending O' Brien Tech receive training in one of the following trades and technologies: Automotive Technology Carpentry Culinary Arts Electrical Hairdressing and Cosmetology Health Technology Heating, Ventilation and Air Conditioning (HVAC) Mechanical Design and Engineering Technology Plumbing and Heating Precision Machining TechnologyAthleticsFall Football Soccer Volleyball Powderpuff Winter Girls Basketball Boys Basketball Spring Baseball Softball Outdoor track Golf