Cover photo for Susan Catherine Mirich-Miller's Obituary
Susan Catherine Mirich-Miller Profile Photo
1954 Susan 2023

Susan Catherine Mirich-Miller

January 12, 1954 — June 27, 2023



Funeral service for Susan Mirich-Miller will be held at 10:00 a.m., Saturday, July 15, 2023 at Gillette Memorial Chapel with Father Steven Titus officiating; interment to follow at Mt. Pisgah Cemetery. Visitation will take place from 4:00 p.m. to 7:00 p.m., Friday, July 14, 2023 at Gillette Memorial Chapel. Susan Catherine Mirich-Miller, a woman of incredible strength and unwavering determination, passed away on June 27, 2023. Born on January 12, 1954, at Offutt Airforce Base in Nebraska to officers Thomas M. Mirich and Elizabeth (Betty) Mirich, Susan was a loving daughter, dedicated wife, cherished sister, and dear friend to many. She touched the lives of those around her with her kindness, compassion, and indomitable spirit. Raised in California, Susan attended and graduated Corvallis catholic school before embarking on her academic journey beyond California. Her thirst for knowledge led her to the University of Wyoming in Laramie, where she completed a bachelor's degree in Zoology. During her graduate studies in Parasitology, she realized the importance of being close to family and decided to return to California. There, she completed Med Tech training and began working for the LA County hospital system. Susan's career path led her to Olive View Hospital within the LA County system, where she served as a clinical lab scientist and general lab safety officer. Her dedication to ensuring the well-being of others was unmatched. Colleagues admired her attention to detail and commitment to creating a safe environment for everyone. Outside of work, Susan found solace in pursuing her passions. One of her greatest joys was participating in trail riding with several riding groups in California. Whether joining local organized rides or embarking on multi-day adventures across Death Valley with a select group of riders, Susan embraced the beauty of nature while indulging in her love for horses. Animals held a special place in Susan's heart. Alongside her beloved horses, she surrounded herself with an assortment of cats and dogs who became loyal companions throughout her life. Their unwavering love brought immeasurable joy and comfort to Susan's everyday existence. In 1997 love knew no bounds for Susan when she renewed a friendship with Glenn Miller, a fellow U of Wyoming graduate living and working in Colorado. Finding an attraction for each other, mutual interests and a strong desire to spend their lives together, Sue and Glenn were married in 1998.  So they began a series of adventures involving family travels, working with friends in the mining industry, adopting cats & dogs and of course hunting antelope and mule deer from their new home in Gillette, Wyoming. Susan is survived by her husband, Glenn and stepson, Jared Miller.  Other family members include aunt, Helene Mirich-Spear of Culver City, CA; brother, Thomas Mirich III MD and his wife Susan of Ellensburg, WA; sister Lisa Donovan of Littleton, CO;  brother Michael Mirich and his wife Erin of San Marcos, CA and brother-in-law Mike Stevenson of Oxnard, CA.  Special in Sue’s heart were her three nieces and three nephews:  Catharine Mirich in Scottsdale, AZ; Anne Mirich in Connecticut; Julie Mirich in Virginia; Kyle Mirich in San Marcos, CA; Cole Donovan in Littleton, CO and Spencer Stevenson in Oxnard, CA. Preceding Susan in death were her parents Dr. Thomas M. Mirich II and Elizabeth Gribbin Mirich and her sister Meg Stevenson.  In this time of grief, let us remember Susan for the incredible person she was. Her unwavering love for her family and friends, her dedication to her work, and her adventurous spirit will be forever etched in our hearts. As we say our final farewells to Susan, let us be comforted by the thought that she has found peace after battling illness with courage. Her memory will forever remain a beacon of strength in our lives as we navigate the path ahead. May she rest in eternal tranquility knowing that she made a lasting impact on those fortunate enough to have known her. Memorials and condolences may be sent in care of Gillette Memorial Chapel 210 West 5th Street, Gillette, WY 82716. Condolences may also be expressed at

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Service Schedule

Past Services


Friday, July 14, 2023

4:00 - 7:00 pm (Mountain time)

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Funeral Service

Saturday, July 15, 2023

10:00 - 11:00 am (Mountain time)


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