Custodians who clean the buildings owned by Springfield Public Schools will once again be managed by district employees. For nearly two decades, Missouri’s largest district has contracted with a company — initially ServiceMaster and, since 2001, Aramark — to order its cleaning supplies and manage its custodial crews. That will change Feb. 1. Carol Embree, chief financial and operations officer, told the school board this week. … There are 178 custodians and five supervisors employed by the district, but they answer to Aramark employees. This fall, the district received written proposals from four companies including Aramark interested in providing the custodial oversight. Embree said a committee reviewed the district’s custodial needs and the proposals — which ranged from $426,000 to $659,000 a year — and concluded the work would be better done “in house.” Embree said outsourcing custodial management is fairly rare in Missouri. She checked with 20 other districts and only two contracted with a company to provide the oversight.