Assignment Record:
| Dates | Assignment |
|---|---|
| 1956 | Ordained |
| 1957—1962 | "Catholic Boy Scouts," Diocese of Belleville, IL |
| 1957—1965 | St. Phillips' Church in East St. Louis, IL |
| 1963—1965 | "Boy Scouts," Diocese of Belleville, IL |
| 1964—1965 | Director of Camp Ondessonk in Ozark, Il |
| 1966—1982 | St. Joseph's Church in Elizabethtown, IL |
| 1966—1982 | Superintendent/Director of Camp Ondessonk in Ozark, IL |
| 1983—1984 | Director of Camp Ondessonk in Ozark, IL |
| 1985—1993 | St. Joseph's Church in Elizabethtown, IL |
| 1985 | Director of Camp Ondessonk in Ozark, IL |
| 1993—1995 | Contact for Catholic Shrine Pilgrimage, Inc. in Golden Frontier, IL |
| 1994—2000 | "Leave of Absence," "Reverend Fathers," – Diocese of Belleville |
| 2001—2007 | "Retired, Reverend Fathers," listed as residing in Belleville, IL – Diocese of Belleville |
Source:
- The Official Catholic Directory, Kenedy & Sons
(The years listed above are the publication years of the Official Catholic Directory. According to the Directory, the assignments provided for a given year are effective as of January 1 of that year. This means that a priest listed in the Directory for a given year at a parish or school was likely at the same assignment for at least part of the previous year as well.)
He died in 2016.
Father Vonnahmen is not indexed after the 2007 Official Catholic Directory.
