Mitchell Karol Sieniawski

Mitchell Karol Sieniawski, a stranger to no one, the Master of Brevity, an early adopter and enthusiast of the home computer, a ‘Good Time Charlie’ Dad who never lacked an adventure-packed vacation for his daughters, and most infamously, a man who loved to devour his food while engaged in conversation, died peacefully Saturday, January 13, 2024 in Denver. He was 90.

Mitch, baptized Mieczyslaw Karol Sieniawski, and born in Jersey City, NJ on August 16, 1933, once aspired to become a Catholic Franciscan priest, but instead found his way to marketing and business, working as store managers, supervisors and setting up new branches for stores across the US, in addition to launching two businesses of his own.

Despite not fulfilling his dream to become a priest, his faith was always a priority for him, and in his senior years, he joined the Catholic brotherhood, Knights of Columbus and became a fourth degree Knight.

To his family and friends, he will be forever remembered as a guy with a great sense of humor— sometimes blatantly inappropriate— but always a straight shooter. He was the first to open a door — seemingly for his daughters, yet walk through it first. He loved Connect 4, and playing cards and cats. And if you were the recipient of his thoughtful holiday and birthday cards, you’d know he had the most beautiful penmanship, perhaps from his days in Seminary school.

To even a stranger on the street, at a restaurant, or just in ear shot, it was clear Mitch wasn’t a shy man. If there was a category of the most extroverted extrovert, that was him. He sometimes blurted inappropriate jokes or comments to pretty women that made his daughters cringe. And not unlike a puppy owner, he wasn’t above using his single dad status with three daughters as a babe magnet.

Regardless of the other women in his life, he doted on his three blonde girls, who spent summers and vacation time with him, pre-planning days together with adventurous agendas any kid would love. Good Time Charlie let his daughters watch whatever they wanted on TV, including The Exorcist when his youngest was seven. He took them on all-day outings to Florida wave pool parks or to the top of the Empire State Building, the Statue of Liberty, and of course his favorite beachside amusement parks and boardwalks, where he’d teach backgammon strategy lessons while sunning on the beach.

Their youth was filled with summer days at the Jersey shore, to Seaside Heights or Point Pleasant, playing skeeball, air hockey and putting quarters in the arcade games that dropped the coin down two tiers where on a good day, quarterswould spill into the bottom slot and provide winnings for yet another game. He’d start and end with his kids by his side, but in between, he was likely shoveling down clams at a boardwalk restaurant while chatting with a stranger he just met.

Even in his final year, he was still meeting new friends, including his caregiver Abreanna Miranda, who stood out at a rehab facility where she was training after he took a nasty fall. At 17, she was a stand-out, dishing out attitude to this old man as if banter with her own grandfather. She was hired immediately and became his Connect 4 buddy, his confidant, and the subject of her Instagram feed with him flipping birds and the usual stuff one expects of the 90-year-old Social Media Mitchell. Abreanna made Mitch’s last year a little brighter, a whole lot sweeter and certainly more fun.

Mitch, the father of five— leaves behind three daughters, Tracy Ann Lewis (her husband Jeff Lewis), Michelle Karol Peterson (husband Craig Peterson) and Angelique Sieniawski LeDoux, as well as two sons whom we know he’ll meet again in heaven, Gregory Allan Sieniawski, who died in infancy, and Noel Shaw, father of his granddaughter Samantha Dixon (husband Chris and their four children, Shepherd, Edmund, Alice and a baby girl on the way). He also leaves behind his grandchildren, Buddy Dillenberg (wife Jordan), Montana Dillenberg, Stryker Lewis, Greg Clements (wife Miranda, and great grandchild Adalyn), Morgan Clements and Jade LeDoux. He is survived by his youngest sister, MaryAnn Olivier and husband Louie Olivier, as well as numerous nieces and nephews he loved dearly. He is preceded in death by his grandson Tristan Clements, his sister Barbara Calendine (and husband Bob) and his parents, Laura Oskiera Sieniawski and Matthew (Mieczyslaw) Sieniawski. We know they’ll be teaching Tris the polka in Heaven.

The funeral service will take place Friday, January 19, 2024 at 11 am MT, at Good Shepherd Catholic Church in Denver, Colorado. A memorial service will follow on Monday, February 5, 2024 at Calvary Cemetery in Clearwater, Florida. The family welcomes flowers be sent to the cemetery, or in lieu of flowers, the charity of your choice in his name.