The average custodian salary at Marlow Es was $17,382 , which is 34 percent lower than the average salary for this job in Oklahoma, and 76 percent lower than the national average for this job . Custodian salaries at Marlow Es typically range from $18,096 to $18,512 (25th to 75th percentile). The highest reported custodian salary was $19,032. There are 7 employees at Marlow Es with the job title custodian.