May God bless you and your...
A life well lived. May all your memories of him be happy. Laurie Viscusi Connie Gander`s stepdaughter
Laurie Viscusi
October 23, 2025


Mystic, Connecticut
Apr 14, 1948 – Oct 20, 2025 (Age 77)
It is with heavy hearts that we announce the passing of John Demlein Jr., at the age of 77, of Mystic, CT on October 20, 2025, after a prolonged illness.John was born on April 14, 1948, in Elmira, N.Y. to John Demlein and Mary Ann Gander Demlein. He was the oldest of eight siblings .After high...
Read MoreA life well lived. May all your memories of him be happy. Laurie Viscusi Connie Gander`s stepdaughter
Laurie Viscusi
October 23, 2025
When I was a LT, I was assigned to the Andrew Jackson in March 1985 to get submarine qualified as an engineering duty officer. John was the XO and due to a number of interesting circumstances I wound up serving as the ship's communicator. CDR (at that time) Demlein worked wonders with me to ensure the ship had a successful patrol cycle. We would also occasionally go round and round when one of the daily drills I planned and executed didn't go as planned...My heartfelt condolences to the...
Dwight Alexander
October 22, 2025
My first engineer on Tullibee. John was an excellent Naval Officer, shiphandler, engineer, and person. May God bless his soul.
Charles Arnest
October 22, 2025
I was John's Executive Officer (XO) in Sculpin for the first half of his command tour. Our personal and professional outlook and persona meshed perfectly, allowing me to learn from him and apply what I learned not only on Sculpin but also in my later command tours. John taught me how to be a real "people person" - looking after the well-being of every crew member while demanding the utmost in attitude, devotion to each other as shipmates, and stellar professional performance.
Steven Slaton
October 22, 2025
To the Demlein Family and Friends -- I was so sorry to hear of CAPT John's passing. I had command of USS SAN JUAN (SSN-751) in Groton as part of CSG-2 from 1996-1999. I was honored to know and work with Captain Demlein, but even more honored to have the good Captain ride with us. A submariner of wisdom, drive, compassion and leadership who I was honored to know and host on my ship. The entire Submarine Force will miss him. v/r Joe Mulloy VADM USN (ret)
Joseph Mulloy
October 22, 2025

Group of 10 Memorial Trees
The Anglican Singers
October 22, 2025 | New London
Rest in Peace Uncle JJ. I will fondly remember our conversations during Christmas at Pop Pop's and the 4th of July get togethers at the Lake. Also, I will never forget the mystic elves biscotti! Love you.
Jason Demlein
October 22, 2025

Group of 10 Memorial Trees
The Anglican Singers
October 22, 2025 | East Haddam
I'm so sorry to hear of John's passing. We had great memories on Lockwood Rd . Baseball in the back yard as well as riding in the scout with the top off. Our prayers are with his family.
Bill Purcell
October 22, 2025