Mark Factor, 42, of St. Louis, Missouri, passed away unexpectedly on August 25, 2026. He is survived by his grandmother, Grace Factor; his aunts and uncles, Greg and Denice, Kim, Mike and Pam, and Jim and Peggy; and his cousins, Kris (Vance), Steve, Rachel, Erick (Kate), Eddie (Dana), Katie (Angelo), Lillie, David, Matt, and Mary; and many other loving family members. He was the beloved son of John and Mary Kaye Factor, beloved brother of Mary Beth Factor, and beloved father of Rebecca and Kevin. He is resting in peace with his grandfathers, Leonard Factor and Melvin Foerster; his grandmother, Mary Foerster; and his uncle, Jim Factor.
Mark was a kind-hearted and gentle soul who loved his family deeply and cherished every moment spent with them. He enjoyed his previous work at the National Geospatial-Intelligence Agency and spoke fondly of his coworkers. Those who knew him best knew his sense of humor well, and he could always be found sharing jokes with his dad. He took immense joy in the outdoors — float trips, hiking, and camping were among his favorite ways to spend time with loved ones. He enjoyed playing cards and watching movies and shows with family, and just two weeks before his passing, he attended what would be his last Cardinals game. Above all, Mark loved his children, Rebecca and Kevin, until his final day.
A visitation will be held at 9:30 a.m. on Saturday, September 12, at Resurrection Lutheran Church, 9907 Sappington Rd, St. Louis, MO 63128, followed by a service at 11:00 a.m. and a luncheon at 12:00 p.m. at the same location. All are welcome. The interment is scheduled for Monday, September 14, at 11:00 a.m. at Resurrection Cemetery at 6901 MacKenzie Rd, St. Louis, MO 63123, followed by a luncheon. For those wishing to send flowers, deliveries can be made to Resurrection Lutheran Church on Friday, September 11, before 2:00 p.m., or on Saturday morning before 9:00 a.m.
In honor of Mark’s love of the outdoors and his happy memories of camping with family, memorial donations can be made to the Missouri Parks Association at https://www.paypal.com/ncp/payment/DG2TFW35E65RL. Checks may also be mailed to:
Missouri Parks Association
P.O. Box 8531
Kansas City, MO 64114
Please note “Mark Factor” in the memo line so the gift can be properly designated.
Service of Kutis South County Chapel.
Mark was a great childhood friend. I have a lot of great memories with him and am grateful to have known him for a time. My deepest condolences to the whole family.
Like Grant, I have such wonderful memories growing up with Mark and Mary Beth. As an adult, I ran into Mark a few years back at a training session where he was with his co-workers and he was so warm and friendly and funny. We grabbed lunch and it was delightful, even after years of having not seen each other, and his co-workers clearly adored him. I am so sorry to everyone for this loss.
We will miss you, Mark.
Love,
Auntie Pam and Uncle Mike
I worked with Mark for a number of years and I’m so sorry to hear of his passing. Sending my condolences to the Factor family.
The Kohring Family sends their sincere sympathy to the Factor Family. We know Mark will live in your hearts forever. Heaven gained an Angel.
I worked with Mark for a short period. He was always warm and welcoming and enjoyed just chatting. Our condolences to his family. May the Joyous and Loving memories carry you through this sorrowful time.
I worked with Mark at NGA . He was quite the professional in everything he did. He will be missed by many.
Dear Mark I Will always have a special place in my heart for you. I Will miss you each and every day. The evenings playing cards and ending up having a double scoop of ice cream will never be the same. We truly enjoyed our time together.Rest in peace. Love
Mary Kaye and John,
We are so saddened by the passing of your son Mark. From the times we spent around him we knew he was a good guy. Please accept our deepest sorrows for you and your families. May God’s blessings touch each of you today and over the days to come.
Tom & Mary Kay
Mark and I worked together for several years. He was easy going, fun to talk to, and a dedicated colleague. My deepest condolences to his family and friends.
When I was a new hire I had the privilege to sit in the same cube quad as Mark. He was kind, funny, and always there to help me get situated (especially with IT stuff). He was the first person to congratulate me when I got married and I remember the way his laugh would echo across the room. My condolences to his family, he will be missed.