St. Casimir Church at 10075 M-65 North, P.O. Box 217, Posen, MI 49776 US - Staff
| Priests | |
| Rev. Arthur Duchnowicz (Pastor) | (989)766-2660 |
| Rev. Clarence Smolinski (Sacramental Minister) | 989.766.2660 |
| Rev. Don Geyman (Sacramental Minister) | - |
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| Custodian | |
| Ernest Romel (Custodian) | - |
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| Main Office | |
| Joan Chappa (Bookkeeper/DRE/Secretary) | (989)766-2660 |
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| Music | |
| Ann Ramsay (Parish Musician) | (989)734-8564 |
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