Timothy J. Tegeler
December 3, 1941-March 15, 2026
Timothy J. Tegeler of Glendale, Missouri died on Sunday March 15, 2026 at Mercy
Hospital after suffering a sudden fall while out running errands. He was 84.
He is survived by his wife of 41 years, Nancy (nee Walther), and daughter, Tiffany
Roberts of Littleton, Colorado and her son, Zachary Sexton and a stepson Bill (Sabrina)
Mixon of Muncie, Indiana and their daughter, Emily. He was previously married to
Kathleen Walker Pratt.
Born in Los Angeles, CA four days before the attack on Pearl Harbor, Tim moved to St.
Louis when his mother Helen (nee Canelis) married Jerome F. Tegeler. He attended
schools in the Ladue school district and Virginia Episcopal School in Lynchburg, VA
before graduating from the University of Arizona in 1964. After service in the Missouri
Air National Guard, Tim began his career in the investment business with his father’s
firm Dempsey-Tegeler and Co. Thereafter, Tim joined Stifel, Nicolaus and Co. for
several years.
In 1982, Tim joined the Board of Directors of Siboney Corporation and became CEO
and Chairman in 1983. Reorganizing the company, he built a subsidiary, Siboney
Learning Group, into a leading provider of educational software in the United States. He
retired in 2009. In 2000, Tim was inducted into the University of Arizona School of
Entrepreneurial Studies Hall of Fame.
Over the years, Mr. Tegeler served on several institutional organizations, primarily as a
Board Member of Mercy Hospital Foundation and a member of Saint Louis University’s
President’s Council. Tegeler Hall at SLU is named after his father, which Tim has supported for
more than 40 years.
Tim was a member of Algonquin Golf Club having served on the Board for 9 years and
was asked to be President in celebration of AGC’s 2003 Centennial Year. A member for
nearly 60 years, he cherished the friendships he made there with many members and
staff. In 2021, Tim and Nancy started a 501c3 not-for-profit called the AGC Employee
Educational Foundation which raises money to provide higher education scholarships
for Algonquin employees and their families, which to date has awarded more than
$128,000 to employees and their family members. In addition to Algonquin, Tim
belonged to several clubs over the years in the Palm Beach, Florida area.
Friends are invited to a Celebration of Life Reception at Algonquin Golf Club, 340 N.
Berry Rd, Glendale, Mo 63122 on Sunday, March 22 beginning at 1pm.
In lieu of flowers memorial contributions suggested to the AGC Employees Educational
Foundation at 1398 Beverly Ave, Glendale MO 63122.
Tim was a major contributor to the success of Algonquin Golf Club and a generous contributor to great causes. He will be missed. Sorry my I will be out of town for The Celebration of Life in memory of Tim.
Phil Hutchison
Tim was a major contributor to the success of Algonquin Golf Club and a generous contributor to great causes. He will be missed. Sorry my I will be out of town for The Celebration of Life in memory of Tim.
Farewell dear friend. Tim was generous and loved Algonquin and his many friends there. He led the club as president and director for many years. He will be missed.
Tim was a great and generous man. His life made many others better
Tim was a very good friend of Cissy and me for many years. Many, many memories and good times. Tim was very ardent advocate for Algonquin and its members and always had the best interests of AGC and all members in the ideas he brought to the board of directors. Cissy and I, as well as the rest of AGC, will miss him. We appreciate the time and effort he put into advancing AGC and its members.
Dan and Cissy LeGear
It has been a joy and honor to have Mr. “Tim” Tegeler and family as loyal guests at Frank Papa’s. Always a joy to have him and Nancy at their little table with the “comfy” chairs. You are and will be missed sir.
Much sympathy from the family at Frank Papa’s.
Tim was a very gracious and generous person. I once told Tim when we worked together, I did not know how he was able to tolerate me. I can not say enough about his support in helping myself and my family. Many years ago he supported my niece’s entrance into law school. His most recent one was his support of my great niece,,Abigail Wuebbeling who will graduate from St. Louis University School of Medicine this May.(2026). I regret I will not be able to thank Tim personally. My sympathies to his family and thank them for giving me the opportunity to know and work with him.