Building/Grounds Maintenance Supervisor salary at Gem Prep: Online LLC

The average building/grounds maintenance supervisor salary at Gem Prep: Online LLC was $77,250 , which is 23 percent higher than the average salary for this job in Idaho, and 23 percent higher than the national average for this job . Building/Grounds Maintenance Supervisor salaries at Gem Prep: Online LLC typically range from $64,729 to $97,309 (25th to 75th percentile). The highest reported building/grounds maintenance supervisor salary was $97,309. There are 3 employees at Gem Prep: Online LLC with the job title building/grounds maintenance supervisor.