Mr. Mittendorf was born in Metropolis on Aug. 1, 1929. He attended Metropolis City Schools, Metropolis Community High School and received a bachelor of science degree in business administration from Southern Illinois University-Carbondale (SIUC). After graduating from SIUC in 1951, he was employed by Union Carbide at the gaseous diffusion plant in Paducah. He served in the U.S. Army during the Korean Conflict from Oct. 5, 1953 until October 1955. He was assigned to the Army Audit Agency in Columbus, Ohio and later transferred to Tokyo, Japan. His last assignment was at Far East Command Headquarters in Tokyo.Upon returning to civilian life, he went to work for the Illinois Department of Financial Institutions as a bank auditor. In October 1957, he began his 54-year association with the City National Bank of Metropolis when he was employed as the assistant cashier. In 1972, he was promoted to vice president and elected to the board of directors. In 1976, he was promoted to president. He retired from the position in 1994 but continued to serve the bank as a director and as the president and chairman of the board of City National Bankcorp Inc., which is the holding company of City National Bank.
Mr. Mittendorf was a member of First United Methodist Church of Metropolis. He served as chairman of the board of trustees and treasurer of the building committee overseeing the construction of the new building after the church sanctuary was destroyed by fire in 1970. He also served in many other positions during his years in attendance at the church.
Mr. Mittendorf also served as the treasurer of Shawnee Community College from 1968 to 1993 and was presented with the Distinguished Service Award for his many years of service to the college. He served his community as a member of the Board of Directors of the Metropolis Chamber of Commerce and treasurer of the Metropolis Rotary Club.
He was an avid quail hunter who practiced good sportsmanship and passed his love of hunting and hunting dogs onto his son, son-in-law and grandsons.
Survivors include his wife of over 25 years, Phyllis Eichorn Davis Mittendorf; one son, Thomas Mittendorf and wife Darla of Metropolis; one daughter, Sarah Duley and husband Mark of Metropolis; one stepdaughter, Cindy Davis of Metropolis; two grandsons, Adam Duley of Rockford and Isaac Mittendorf of Murray, Ky.; one granddaughter, Kate Mittendorf Pereira and husband Kevin of Nashville, Tenn.; two stepgrandsons, Eric McDearmon of Metropolis and Zach McDearmon of Doral, Fla.; one stepgranddaughter, Melissa McDearmon of Marietta, Ga.; and one stepgreat-grandson, Conner McDearmon.
He was preceded in death by his first wife, Helen Frances Foreman Mittendorf; his parents, Hubert John and Agnes Marie Trampe Mittendorf; and one brother, Loren H. Mittendorf.
Funeral service was held Friday at 2 p.m. at First United Methodist Church with Dr. James Wright and Rev. Dan Whitfield officiating. Music was provided by Linda Conn.
Burial followed at the Masonic Cemetery of Metropolis. Pallbearers were Thomas Mittendorf, Mark Duley, Adam Duley, Isaac Mittendorf, Eric McDearmon, Dale Mittendorf, Kevin Pereira and Chip Bowen. Honorary pallbearers were the following members of the current board of directors of City National Bank: Steven Farmer, Rick Kotter, Earl Marlman, Tom Pullen and Jim Walters Jr.
Memorials may be made to the Fidelis Class Memorial Fund, First United Methodist Church, 100 E. Fifth St., Metropolis, IL 62960; or Project Hope Humane Society, 1660 W. 10th St., Metropolis, IL 62960.
Miller Funeral Home was in charge of arrangements.