The average custodian salary at Apollo Es was $24,641 , which is 7 percent lower than the average salary for this job in Oklahoma, and 65 percent lower than the national average for this job . Custodian salaries at Apollo Es typically range from $21,234 to $26,982 (25th to 75th percentile). The highest reported custodian salary was $26,982. There are 3 employees at Apollo Es with the job title custodian.