1223 W. National Avenue
Milwaukee, WI. 53204
- Main Office Hours: Monday – Friday (5:00 am to 5:00 pm). OSSI re-opens at 9:00 pm for a third shift.
- Office Hours for Applications: Monday – Friday (8:00 am – 4:00 pm)
- OSSI’s weekend hours depend on the needs of clients.
OSSI is a 3 shift-operation and hours vary due to the needs of our customers.