The quick answer to your question is: Yes, Connecticut is an employment at will state. That means that discharge “contravenes a clear mandate of public policy” (Sheets v. Teddy's Frosted Foods, Inc., 179 Conn. 471, 474 (1980)). There are prohibitions against discharging an employee for filing a claim for unemployment or workers' compensation, filing a wage enforcement claim, and exercising federal or state constitutional rights of religious freedom, free speech, or assembly. The public policy exception is quite limited and has been recognized only in situations where the employer's action violates some law.
There also can be an action for wrongful termination based on an implied employment contract. In order to prevail on such a claim, an employee must prove that the employer agreed, either by words, action, or conduct, to not terminate the employee without just cause (D'Ulisse-Cupo v. Board of Directors of Notre Dame High School, 202 Conn. 206, 212 n.2 (1987))
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