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Gary Sedlacko

Published June 08,2024

Obituary's Biography:

Gary Sedlacko, 68, a resident of Grayslake, IL, passed away June 6, 2024 surrounded by his family, at Advocate Condell Medical Center in Libertyville, IL.  He was born January 31, 1956 in Streator, IL to Stephen and Julia (nee: Yedinak) Sedlacko.

Gary and his twin brother, Greg, were the fourth and fifth of six boys. The majority of Gary’s brothers lived locally throughout their adulthood, so holidays were typically large, loud gatherings. 

He received a degree in Education from Northern Illinois University in 1978 where he was a member of the Marching Band. Playing euphonium, Gary traveled throughout the country to play in competitions, parades, and sporting events. He always cherished his memories of their yearly trip to New Orleans, though the details were unsurprisingly fuzzy. The opportunity to play the halftime show at the Rose Bowl was the highlight of his playing career.

Gary taught middle school for one year before changing careers to work in the emerging computer and technology industry. He taught himself computing and programming on his way to becoming a Systems Engineer.  The early days of computing were full of challenges, which Gary relished solving until his retirement in 2002.

As a young man, he was passionate about sailing on the Chain of Lakes and his yearly trip to the British Virgin Islands. He joined Sitzmark Ski Club in 1979 and over many years was very active in the club.  He helped organize events like rafting trips to Crivitz, a yearly pig roast, and MS walks, forging life-long friendships all the while. And once in a great while he may have actually skied!  

Once retired, he revived his love of music and joined the Round Lake Area Community Band, performing in many local area concerts. Playing the same instrument as his sons, they had the pleasure of playing together in holiday concerts and Tuba Christmas.

Most of all, Gary loved being around his family, spending time with his wife and two sons. He and Tari entertained two rambunctious boys and their neighborhood friends by day, and relaxed on their patio by night.  He especially treasured their yearly retreat to the cabin at Afterglow Lake.

Gary became a grandfather late last year. His excitement and love for his granddaughter, Elliot, was immeasurable.

Gary is survived by his wife of 35 years, Teresa Sedlacko, whom he wed on September 17, 1989 in Prospect Heights, IL, his children Christopher (Jamie) Sedlacko of Wheaton, IL and Joseph Sedlacko of Chicago, IL, his granddaughter Elliot Sedlacko of Wheaton, IL, and his siblings Stephen Sedlacko, Allen (the late Alice) Sedlacko, Edwin (Nancy) Sedlacko, Greg (Barb) Sedlacko, and Neal (the late Debbie) Sedlacko.  

A visitation is scheduled for Monday, June 10, 2024 at Strang Funeral Chapel & Crematorium 410 E. Belvidere Rd. Grayslake, IL 60030 from 5:00 pm until 8:00 pm.  In lieu of flowers, donations may be made to the National Multiple Sclerosis Society.  For more information log onto www.strangfuneral.org or contact (847)223-8122.

To view slideshow click here: https://www.tributeslides.com/tributes/show/PS7KFSZN5RF6RGXL

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  1. Wishing your family peace and comfort during this time. Even as a tot on Baker St. in Streator, Gary always seemed to have a contagious spirit. And when life threw him a lemon, he went right ahead and made the lemonade. Rest in peace.
    Kaye and John

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