John (Jack) Sinon, Jr

May 1, 1956 – May 20, 2019

John Jack Sinon Jr obituary image 1



John (Jack) Sinon died Monday May 20, 2019 of complications from a stroke suffered last November.

Born May 1, 1956 in Seattle, Jack was the proud father of three sons, Michael James, Timothy John, and Alexander Evan and grandfather to Jonah, John, Leo, and Amelia all of Des Moines.  He is survived by a brother, James Sinon of Bellevue, and sisters, Catherine Dickson-Schaffer of Los Angeles, and Connie Sinon of Puyallup.

A longtime resident of Des Moines and Normandy Park, Jack graduated from Mt. Rainier High School in 1974.  He then joined the Army, serving in Germany for several years in the 8th Armored Division.  Upon returning he earned a B.S degree in Engineering and a Master’s degree in Physics from the University of Washington.

During his long career at The Boeing Company, Jack became a senior airplane certification engineer and an electrical strike expert. He retired in 2015 as the Boeing Liaison to the FAA.

Inurnment will be Friday May 24 at 2:15 at Washington Memorial Cemetery in Sea-Tac, Washington near his parents John A. Sinon, Sr. and Eileen M. Sinon


K. Williams
Natchez, MS
Jun 15, 2019

My thoughts and prayers go out to you and your family. Please keep in mind that God will heal your broken hearts and will strengthen you during this difficult time. (Psalm 147:3) To find out more regarding the hope for the dead, visit and search “death”.

Todd Lukkason
Renton, WA
May 23, 2019

Several Boeing colleagues cannot access this link for some reason so they are sharing memories at this link:

Todd Lukkason
Renton, WA
May 23, 2019

Jack was a pleasure to work with at Boeing. He was a wealth of knowledge and I admire the way he communicated technical matters with others. One memory that stands out is the huge smile on his face when I asked about his grandkids after seeing their photos at his desk. He was certainly a proud father and grandfather. My thoughts and prayers are with the family during this time.

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