Jon Jones, President of Raytheon Space and Airborne Systems died of a sudden heart attack last weekend. He was 55 years old. The company designs avionics and sensors for fighter jets.

“Jon was a valued contributor to Raytheon for 33 years, an outstanding leader within our company, industry and community, and a dear friend,” Raytheon Chairman and CEO William H. Swanson said in a statement. “He was a wonderful innovator who guided numerous programs of the utmost importance to our men and women in uniform.”

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