The average custodian salary at Emerson Es was $20,433 , which is 23 percent lower than the average salary for this job in Oklahoma, and 71 percent lower than the national average for this job . Custodian salaries at Emerson Es typically range from $16,151 to $27,335 (25th to 75th percentile). The highest reported custodian salary was $29,058. There are 6 employees at Emerson Es with the job title custodian.