Program Information SBM is one of the largest custodial and light building maintenance companies in the United States as well as having an extensive international presence. SBM has a solid 35-year track record of strong business growth and is continuing its rapid pace of expansion. The company has over 8,000 employees deployed at more than 900 client sites. Our domestic and international customers are fortune 100 companies in the bio tech, pharmaceutical and high tech industries. T