Thadius W. Greer, Jr. age 73, of Madison passed away following an illness on May 6, 2025, at Tripoint Medical Center in Concord. Born August 25, 1951, in St. John, AZ to Thadius W. and Nelma (nee: Larsen) Greer, he had been a resident of NE Ohio for the last 30 years. Thad worked as a Consulting Engineer in Nuclear Energy. Along with his wife, he is a member of the Church of Jesus Christ of Latter Day Saints in Perry. Survivors include his wife Jill of Perry; son T. Tyler Greer of Perry; mother Nelma Greer of St. John, AZ; siblings Lacy (Jeanne) Greer of St. John, AZ, Mary Serena Greer of St. John, AZ and Vinson (Sherrie) Greer of Central, AZ; many extended family and friends. A memorial service will be held Monday at the church (please call the church for information). He will be laid to rest at St. John Community Cemetery in St. John, AZ.