Professional Educational Services Group is one of the premier employee segment contracting companies. Located in Caledonia, Mich., the company specializes in substitute teacher contracting. It is a member of the Michigan Association of School Administrators, Michigan Association of School Boards and the Michigan Association of Intermediate School Administrators. Professional Educational Services Group serves school district s through the services of AESOP, which is one of the leading substitute placement systems in the United States. Its staff includes financial planners, life underwriters, stock brokers, employee benefit professionals, certified-financial educators and investment advisor representatives. Professional Educational Services Group offers payroll services from Paychex, which is one of the largest payroll providers in Michigan.