Timothy John Griesmer, 83, of Londonderry, NH, passed away peacefully on Thursday, April 2, 2026, at his home, surrounded by his loving family. He was born on January 12, 1943, in Cleveland, OH, a son of the late Robert and Marie (Miller) Griesmer. Timothy “Tim” had been a resident of Londonderry for the past 10 years, previously enjoying time with residences in Reading, Massachusetts, Bonita Springs, Florida and Center Harbor, New Hampshire.
Tim enjoyed a long and successful career as a Managing Director at Putnam Investments, where he was respected for his leadership, integrity, and dedication. He took great pride in his work and the relationships he built throughout his career.
Above all, he cherished time spent with his family and found great joy in watching his children and grandchildren grow and thrive. He enjoyed traveling, golf, fishing and cooking, especially his holiday dinners.
He is survived by his beloved wife of 61 years, Margaret (Clausen) Griesmer; four daughters, Heidi Rubin and husband Marc, Meghan Rebel and husband Ron, Katherine Walsh and husband Terrence, and Christine Griesmer and husband Nathan Roberts; two sons, Robert Griesmer and Timothy Griesmer and wife Gia Liberati; thirteen grandchildren; and two sisters, Carole Schumacher and Jane Griesmer, along with many nieces, nephews, and extended family members.
There are no calling hours. Following cremation, a Mass of Christian Burial will be celebrated privately for the family. In lieu of flowers, memorial contributions may be made to the Dana-Farber Jimmy Fund, Dana-Farber Cancer Institute, PO Box 849168, Boston, MA 02284-9168 or at https://www.jimmyfund.org/