Highest salary at Ofallon Thsd 203 in year 2015 was $210,527. Number of employees at Ofallon Thsd 203 in year 2015 was 200. Average annual salary was $60,227 and median salary was $64,814. Ofallon Thsd 203 average salary is 29 percent higher than USA average and median salary is 49 percent higher than USA median salary.