Shiawassee Regional Education Service District Job Description. BUSINESS OFFICE: 114 W. NORTH ST. OWOSSO, MI 48867. HUMAN RESOURCE DEPT. 989.743.3471. Position Opportunity. APPLY ONLINE: REQUIRED TO COMPLETE APPLICATION LOCATED @. https://www.sresd.org/about-us/departments/business-office/job-opportunities/. Title: BUSINESS OFFICE SPECIALIST-AP/AR - FULL TIME WITH BENEFITS. Salary Range. $44,601 - $48,480. Job Summary. Under the general supervisi...