The Arrival (1996)

Zane (Charlie Sheen), a young, mild-mannered astronomer discovers an extraterrestrial radio signal. After being fired from his organization for reporting this to his superior, he takes a chance on discovering the truth: that his workplace is not quite what it seems to be and a sinister conspiracy is at work. The aliens are keeping a deadly secret, and will stop at nothing to prevent Zane from learning it.