Employment & Human Resources District Employment Opportunities For more information on any position, please contact our District’s Central Office at (406) 234-3840 or stop by at 1604 Main Street Montana Office of Public Instruction (OPI) Jobs-for-Teachers Employment Postings The Miles City Unified School District posts employment openings with theMontana Office of Public Instruction (OPI) “Jobs-for-Teachers” listing service. Search Terms/Filters: Miles City or Custer County MCUSD Employment Listings Application Form