ABOUT HES HES is a premier national provider of facilities management services focused 100% on educational institutions. Headquartered in Knoxville, Tennessee, we pride ourselves on building best-in-class programs for custodial, maintenance, grounds, and landscaping services. With hundreds of years of combined facilities experience, our leadership team is comprised of results-oriented, hands-on executives and facilities experts who give your facilities our full attention. Whether for a grounds and landscaping program, custodial services, or maintenance solutions, HES will change the way you look at facilities management.