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Official Obituary of

John Marion Prosek

June 13, 1962 ~ October 24, 2023 (age 61) 61 Years Old

John Prosek Obituary

John M. Prosek, age 61, a resident of Star Valley Ranch since 2016, passed away October 24, 2023. Beloved husband of almost 33 years to Jill Prosek (nee Mondack). Proud and loving father to Katrina (Joseph) Daley and Natasha Prosek. Soon to be grandfather to baby girl Daley (expected in February 2024). Dear brother of Edina Roberts and half-brother to Julie Hackman and Jodie Vaughn. Uncle to Michael (Rose) Wulf and Heather Giuliani (nee Wulf). Great-Uncle to Aleina Wulf, and Sophie & Amelia Giuliani. 

John was born June 13, 1962 in Whittier, California to the late Edward Prosek and the late Patsy Shields. He was the beloved son-in-law to Ronald and the late Arlene Mondack. 

John was an extremely passionate, adventurous, hardworking, and loving family-oriented man for his 61 years. In his earlier years, he loved to race sailboats and was a proud participant in the Mackinac Island Race for 5 years. He was always a handyman fixing and building things; which also translated to Lego mastery and passed that along to his daughters. He lived his dream of camping, hiking, skiing, kayaking, and building a beautiful life in Wyoming with Jill and with dogs Millie and Benny (and the late Ralphie and Wolfie) in tow. As a lifelong learner, John had many passion projects and hobbies such as photography, cooking, and had a very successful career in computers and technology. John explored land, sea, and space as he loved astronomy, traveled 48/50 states, but had a strong dislike of sand. John was loved dearly and will be deeply missed by each and every person whose life he touched (and if you knew John, you know he was always making friends wherever he went). 

Services will be held at a later date. If you have any special stories or memories of John that you would like to share with the family, kindly send them via email to

"In lieu of flowers, consider donating to either of the two charities that John felt most passionate about.


National Parks Foundation:


Lucky's Place (where the Prosek's adopted Millie):


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